Slave plate fixing structure and battery pack

Abstract

The utility model relates to the technical field of battery packs, in particular to a slave plate fixing structure and a battery pack. The slave plate fixing structure comprises a first support, a second support and a mounting beam, the first support is provided with a containing cavity with an opening in one end, and the containing cavity is used for containing a slave plate. The mounting beam is arranged on the side, provided with the opening, of the first support, the second support is clamped between the first support and the mounting beam, and the second support is detachably connected with the first support and blocks the opening. Wherein a connecting part is formed on the first bracket, and the first bracket is connected to the mounting beam through the connecting part. According to the slave plate fixing structure and the battery pack provided by the invention, the problems of weak protection performance and poor positioning effect of an existing slave plate bracket are solved.

Description

Technical Field

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

[0002] BMS (Battery Management System) is a very important structure in the battery pack, which consists of a main board and a slave board. Among them, the slave board is mainly used to collect the voltage and temperature of the battery cell. In the existing battery pack structure, the fixation of the slave board must not only consider its own safety, but also the safety when plugging and unplugging the flexible circuit board extending from the battery module.

[0003] At present, the slave board is fixed and protected by a bracket, but the traditional bracket has weak protection performance for the slave board, and it is difficult to achieve all-round protection, and the slave board is at risk of damage. In addition, the bracket is often installed on the box of the battery pack, and the positioning tolerance is larger than that of the battery module, which can easily cause the flexible circuit board to be twisted when plugging and unplugging, further reducing safety. Utility Model Content

[0004] Based on this, it is necessary to provide a slave board fixing structure and a battery pack to solve the problems of weak protection performance and poor positioning effect of the existing slave board bracket.

[0005] The present application provides a slave plate fixing structure, which includes a first bracket, a second bracket and a mounting beam, wherein the first bracket is provided with a accommodating cavity with an opening at one end, and the accommodating cavity is used to accommodate the slave plate; the mounting beam is arranged on a side of the first bracket where the opening is provided, the second bracket is clamped between the first bracket and the mounting beam, and the second bracket is detachably connected to the first bracket and sealed at the opening; wherein a connecting portion is formed on the first bracket, and the first bracket is connected to the mounting beam via the connecting portion.

[0006] In one embodiment, the first bracket and the second bracket are snap-connected.

[0007] In one of the embodiments, a snap-in protrusion is provided on the outer wall of the first bracket, a snap-in plate is connected to the second bracket, a snap-in groove is provided on the snap-in plate, and the snap-in protrusion is inserted into the snap-in groove and snap-fitted with the snap-in groove.

[0008] In one of the embodiments, there are multiple clamping protrusions and multiple clamping plates, and the multiple clamping protrusions and the multiple clamping plates are arranged in a one-to-one correspondence.

[0009] In one of the embodiments, a fixing point is provided in the accommodating cavity, and the fixing point is used to connect with a fastener so as to lock the slave plate to the first bracket; wherein an avoidance hole is opened in the second bracket corresponding to the fixing point.

[0010] In one of the embodiments, a through hole communicating with the accommodating cavity is formed on a side wall of the first bracket, and the through hole is used to avoid the plug-in end of the slave board.

[0011] In one embodiment, the first bracket is provided with a reinforcing rib, and / or the second bracket is provided with a reinforcing rib.

[0012] In one embodiment, the plate thickness L1 of the first bracket satisfies 1.5 mm ≤ L1 ≤ 2.5 mm; and / or the plate thickness L2 of the second bracket satisfies 1.5 mm ≤ L2 ≤ 2.5 mm.

[0013] In one embodiment, the slave plate fixing structure also includes a limiting plate, one end of which is connected to the side of the first bracket away from the mounting beam, and the other end of which extends and bends in a direction away from the mounting beam so that the limiting plate forms an L shape.

[0014] The present application also provides a battery pack, which includes a case, a slave plate, a battery module, and the slave plate fixing structure described in any one of the above embodiments, wherein the first bracket and the second bracket are connected to form a bracket assembly, and the slave plate is installed in the bracket assembly; the case is provided with an installation cavity, the mounting beam is arranged in the installation cavity and connected to the case, and the mounting beam divides the installation cavity into a first cavity and a second cavity, the battery module is arranged in the first cavity and connected to the case, and the bracket assembly is arranged in the second cavity and connected to the mounting beam, wherein the battery module is electrically connected to the slave plate.

[0015] Compared with the prior art, the slave board fixing structure and battery pack provided in the present application can, when installing the slave board, first place the slave board into the accommodating cavity through the opening of the accommodating cavity, and then, by connecting the second bracket and the first bracket, the second bracket is blocked in the opening. In this way, the first bracket and the second bracket can form an all-round protection for the slave board, which greatly improves the safety of the slave board. In addition, since the mounting beam is usually fixed in position in the battery pack, the first bracket is fixed to the mounting beam through the connecting part, and the mounting beam can be used for positioning, which is conducive to reducing dimensional errors, making the plug-in and pull-out cooperation between the flexible circuit board of the battery module and the slave board more precise, and effectively reducing the risk of distortion of the flexible circuit board during plug-in and pull-out due to errors, thereby greatly improving the safety of the flexible circuit board. At the same time, after the first bracket and the mounting beam are fixed, the second bracket can be limited synchronously to prevent the second bracket from being separated from the first bracket, further improving the safety of the slave board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A partial structural schematic diagram of a slave plate fixing structure according to an embodiment of the present application;

[0018] Figure 2 An exploded view of a slave plate fixing structure according to an embodiment of the present application;

[0019] Figure 3 An exploded view of a plate fixing structure according to an embodiment of the present application from another perspective.

[0020] The symbols in the figure mean the following:

[0021] 100, plate fixing structure; 10, bracket assembly; 11, first bracket; 1101, accommodating cavity; 1102, opening; 1103, through hole; 111, connecting portion; 112, snap-fit ​​protrusion; 113, fixing point; 114, reinforcing rib; 115, limiting plate; 12, second bracket; 1201, avoidance hole; 121, snap-fit ​​plate; 1211, snap-fit ​​groove. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0024] 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 at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0027] BMS (Battery Management System) is a very important structure in the battery pack, which consists of a main board and a slave board. Among them, the slave board is mainly used to collect the voltage and temperature of the battery cell. In the existing battery pack structure, the fixation of the slave board must not only consider its own safety, but also the safety when plugging and unplugging the flexible circuit board extending from the battery module.

[0028] At present, the slave board is fixed and protected by a bracket, but the traditional bracket has weak protection performance for the slave board, and it is difficult to achieve all-round protection, and the slave board is at risk of damage. In addition, the bracket is often installed on the box of the battery pack, and the positioning tolerance is larger than that of the battery module, which can easily cause the flexible circuit board to be twisted when plugging and unplugging, further reducing safety.

[0029] See also Figure 1-Figure 3In order to solve the problem that the existing slave plate bracket has weak protection performance and poor positioning effect, the present application provides a slave plate fixing structure 100, which includes a first bracket 11, a second bracket 12 and a mounting beam (not shown). The first bracket 11 is provided with a receiving cavity 1101 with an opening 1102 at one end, and the receiving cavity 1101 is used to accommodate the slave plate. The mounting beam is arranged on a side of the first bracket 11 where the opening 1102 is provided, and the second bracket 12 is sandwiched between the first bracket 11 and the mounting beam, and the second bracket 12 is detachably connected to the first bracket 11 and blocked at the opening 1102. Among them, a connecting portion 111 is formed on the first bracket 11, and the first bracket 11 is connected to the mounting beam through the connecting portion 111.

[0030] It is understandable that when installing the slave board, the slave board fixing structure 100 provided in the present application can first be placed into the accommodating cavity 1101 from the opening 1102 of the accommodating cavity 1101, and then, by connecting the second bracket 12 and the first bracket 11, the second bracket 12 is blocked in the opening 1102. In this way, the first bracket 11 and the second bracket 12 can form an all-round protection for the slave board, which greatly improves the safety of the slave board. In addition, since the mounting beam is usually fixed in position in the battery pack, the first bracket 11 is fixed to the mounting beam through the connecting portion 111, and the mounting beam can be used to achieve positioning, which is conducive to reducing dimensional errors, making the plug-in and pull-out cooperation between the flexible circuit board of the battery module and the slave board more accurate, effectively reducing the risk of distortion of the flexible circuit board during plug-in and pull-out due to errors, thereby greatly improving the safety of the flexible circuit board. At the same time, after the first bracket 11 and the mounting beam are fixed, the second bracket 12 can be simultaneously limited to prevent the second bracket 12 from being separated from the first bracket 11, further improving the safety of the slave board.

[0031] In one embodiment, if Figure 1 As shown, the side wall of the first bracket 11 is provided with a through hole 1103 connected to the accommodating cavity 1101, and the through hole 1103 is used to avoid the plug-in end of the slave board. By providing the through hole 1103 on the first bracket 11, it is convenient for the plug-in end of the slave board to extend out and plug and match with the flexible circuit board, so as to realize the information collection of the battery module by the slave board.

[0032] Further, in one embodiment, if Figure 3 As shown, a fixing point 113 is provided in the accommodating cavity 1101, and the fixing point 113 is used to connect with a fastener to lock the slave plate to the first bracket 11. The second bracket 12 is provided with an avoidance hole 1201 corresponding to the fixing point 113.

[0033] Usually, the slave plate is locked with the fixing point 113 by fasteners such as bolts. When the second bracket 12 is connected to the first bracket 11, there is a risk that the end of the bolt interferes with the second bracket 12. In this embodiment, by providing the avoidance hole 1201 on the second bracket 12, the probability of interference between the second bracket 12 and the bolts fixing the slave plate can be reduced, thereby improving the reliability of the connection between the first bracket 11 and the second bracket 12.

[0034] Specifically, the present application sets six fixing points 113, and correspondingly, the second bracket 12 opens six avoidance holes 1201. Of course, the number of fixing points 113 and avoidance holes 1201 can also be reasonably set according to actual needs, for example, they can be set to four, five, seven, eight or more, etc., as long as they can achieve the same effect.

[0035] In one embodiment, the first bracket 11 and the second bracket 12 are snap-connected. The snap-connection method is relatively simple and can achieve a detachable connection between the first bracket 11 and the second bracket 12, which is beneficial for replacing the damaged parts when the first bracket 11 and the second bracket 12 are damaged, thereby reducing costs.

[0036] Specifically, in one embodiment, if Figure 1 and Figure 2 As shown, a clamping protrusion 112 is provided on the outer wall of the first bracket 11, a clamping plate 121 is connected to the second bracket 12, a clamping groove 1211 is provided on the clamping plate 121, and the clamping protrusion 112 is inserted into the clamping groove 1211 and clamped with the clamping groove 1211. In this way, the clamping of the first bracket 11 and the second bracket 12 is relatively simple, easy to process, and can achieve a stable clamping effect to prevent the first bracket 11 and the second bracket 12 from being separated.

[0037] Furthermore, in one embodiment, there are multiple clamping protrusions 112 and clamping plates 121, and the multiple clamping protrusions 112 and the multiple clamping plates 121 are arranged in a one-to-one correspondence. In this way, the connection reliability between the first bracket 11 and the second bracket 12 can be further improved.

[0038] In one embodiment, if Figure 1 and Figure 2 As shown, the slave plate fixing structure 100 further includes a limiting plate 115, one end of which is connected to the side of the first bracket 11 away from the mounting beam, and the other end of which extends and bends in a direction away from the mounting beam, so that the limiting plate 115 forms an L shape. In this way, the limiting portion can gather the wire harness or the conductive bar through its L-shaped structure to position the arrangement and direction of the wire harness or the conductive bar, and the arrangement of the wire harness, etc. is more reasonable, which is conducive to improving the assemblability of the internal components of the battery pack.

[0039] Specifically, the limiting plate 115 and the first bracket 11 are preferably an integrally formed structure to enhance the connection strength between the limiting plate 115 and the first bracket 11 and prevent the limiting plate 115 from breaking.

[0040] In order to improve the structural strength of the first bracket 11, in one embodiment, Figure 1 and Figure 2 As shown, the first bracket 11 is provided with reinforcing ribs 114, so that the first bracket 11 has better protection performance for the slave plate.

[0041] Furthermore, in one embodiment, the plate thickness L1 of the first bracket 11 satisfies 1.5 mm ≤ L1 ≤ 2.5 mm. In this way, the structural strength of the first bracket 11 can be ensured, and the weight of the first bracket 11 can be reduced to achieve lightweight. When the plate thickness of the first bracket 11 is greater than 2.5 mm, the first bracket 11 is thicker, resulting in increased weight and increased cost of the first bracket 11. When the plate thickness of the first bracket 11 is less than 1.5 mm, the first bracket 11 is thinner, resulting in insufficient structural strength of the first bracket 11 and reduced protection performance against the slave plate.

[0042] Exemplarily, the plate thickness L1 of the first bracket 11 is preferably set to 2 mm. Of course, it can also be set to 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm or 2.5 mm, etc., which are not listed here one by one.

[0043] In order to improve the structural strength of the second bracket 12, in one embodiment, Figure 2 As shown, the second bracket 12 is provided with reinforcing ribs 114, so that the second bracket 12 has better protection performance for the slave plate.

[0044] Furthermore, in one embodiment, the plate thickness L2 of the second bracket 12 satisfies 1.5 mm ≤ L2 ≤ 2.5 mm. In this way, the structural strength of the second bracket 12 can be ensured, and the weight of the second bracket 12 can be reduced to achieve lightweight. When the plate thickness of the second bracket 12 is greater than 2.5 mm, the second bracket 12 is thicker, resulting in increased weight and increased cost of the second bracket 12. When the plate thickness of the second bracket 12 is less than 1.5 mm, the second bracket 12 is thinner, resulting in insufficient structural strength of the second bracket 12 and reduced protection performance against the slave plate.

[0045] Exemplarily, the plate thickness L2 of the second bracket 12 is preferably set to 2 mm. Of course, it can also be set to 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.3 mm or 2.5 mm, etc., which are not listed here one by one.

[0046] In one embodiment, the first bracket 11 and the second bracket 12 are plastic parts. The first bracket 11 and the second bracket 12 made of plastic can achieve good insulation and heat insulation effects and are also light in weight.

[0047] Specifically, the material of the first bracket 11 and the second bracket 12 can be PC or PP.

[0048] The present application also provides a battery pack, which includes a box body, a slave board, a battery module, and a slave board fixing structure 100 of any one of the above embodiments, wherein a first bracket 11 and a second bracket 12 are connected to form a bracket assembly 10, and the slave board is installed in the bracket assembly 10. The box body is provided with an installation cavity, a mounting beam is arranged in the installation cavity and connected to the box body, and the mounting beam separates the installation cavity into a first cavity and a second cavity, the battery module is arranged in the first cavity and connected to the box body, and the bracket assembly 10 is arranged in the second cavity and connected to the mounting beam, wherein the battery module is electrically connected to the slave board through a flexible circuit board.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A plate fixing structure, characterized in that: It comprises a first bracket (11), a second bracket (12) and a mounting beam, wherein the first bracket (11) is provided with a receiving cavity (1101) having an opening at one end (1102), and the receiving cavity (1101) is used to receive a slave plate; The mounting beam is arranged on a side of the first bracket (11) where the opening (1102) is arranged, and the second bracket (12) is sandwiched between the first bracket (11) and the mounting beam, and the second bracket (12) is detachably connected to the first bracket (11) and blocks the opening (1102); Wherein, a connecting portion (111) is formed on the first bracket (11), and the first bracket (11) is connected to the mounting beam via the connecting portion (111).

2. The plate fixing structure according to claim 1, characterized in that: The first bracket (11) and the second bracket (12) are snap-connected.

3. The plate fixing structure according to claim 2, characterized in that: A clamping protrusion (112) is provided on the outer side wall of the first bracket (11), a clamping plate (121) is connected to the second bracket (12), a clamping groove (1211) is provided on the clamping plate (121), and the clamping protrusion (112) is inserted into the clamping groove (1211) and is clamped and matched with the clamping groove (1211).

4. The plate fixing structure according to claim 3, characterized in that: The number of the clamping protrusions (112) and the clamping plates (121) is plural, and the plural clamping protrusions (112) and the plural clamping plates (121) are arranged in a one-to-one correspondence.

5. The plate fixing structure according to claim 1, characterized in that: A fixing point (113) is provided in the accommodating cavity (1101), and the fixing point (113) is used to be connected with a fastener so as to lock the slave plate to the first bracket (11); Wherein, the second bracket (12) is provided with an avoidance hole (1201) corresponding to the fixing point (113).

6. The plate fixing structure according to claim 1, characterized in that: A through hole (1103) communicating with the accommodating cavity (1101) is provided on the side wall of the first bracket (11), and the through hole (1103) is used to avoid the plug-in end of the slave board.

7. The plate fixing structure according to claim 1, characterized in that: The first bracket (11) is provided with a reinforcing rib (114), and / or the second bracket (12) is provided with a reinforcing rib (114).

8. The plate fixing structure according to claim 1, characterized in that: The plate thickness L1 of the first bracket (11) satisfies 1.5 mm ≤ L1 ≤ 2.5 mm; And / or, the plate thickness L2 of the second bracket (12) satisfies 1.5 mm ≤ L2 ≤ 2.5 mm.

9. The plate fixing structure according to claim 1, characterized in that: The slave plate fixing structure also includes a limiting plate (115), one end of which is connected to the side of the first bracket (11) away from the mounting beam, and the other end of which extends and bends in a direction away from the mounting beam, so that the limiting plate (115) forms an L shape.

10. A battery pack, characterized in that: It comprises a box body, a slave board, a battery module and a slave board fixing structure according to any one of claims 1 to 9, wherein the first bracket (11) and the second bracket (12) are connected to form a bracket assembly (10), and the slave board is installed in the bracket assembly (10); The box body is provided with an installation cavity, the installation beam is arranged in the installation cavity and connected to the box body, and the installation beam divides the installation cavity into a first cavity and a second cavity, the battery module is arranged in the first cavity and connected to the box body, the bracket assembly (10) is arranged in the second cavity and connected to the installation beam, wherein the battery module is electrically connected to the slave board.

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