BMS mounting plate and battery pack

Abstract

The utility model discloses a BMS (Battery Management System) mounting plate and a battery pack, the BMS mounting plate is used for mounting a BMS component, and the BMS mounting plate comprises a plate body and a reinforcing structure arranged in a mounting area of the plate body; the BMS assembly is fixedly connected with the plate body and is located in the mounting area; the reinforcing structure is used for improving the structural strength of the plate body. The technical scheme of the utility model aims to solve the problems that the stability is reduced due to the weight reduction of the box body, the vibration is easy to occur, and the risks of deformation and cracking of the BMS mounting plate are increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packaging accessories, in particular to a BMS installation plate and a battery pack. Background Art

[0002] Due to the current demand for reducing the weight and cost of battery packs, the method currently commonly used is to reduce the weight of the box. This reduces the stability of the battery pack box, causing the battery module to vibrate easily. The BMS mounting plate is thin and is prone to excessive bending, stretching and other deformations during vibration, causing the BMS mounting plate to crack. Utility Model Content

[0003] The main purpose of the utility model is to provide a BMS mounting plate, aiming to reduce the risk of deformation and cracking of the BMS mounting plate.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a BMS installation plate, comprising:

[0005] A board body, wherein a mounting area is provided on the board surface of the board body; the BMS component is connected and fixed to the board body and is located in the mounting area; and

[0006] The reinforcement structure is arranged in the installation area of ​​the plate body to improve the structural strength of the plate body.

[0007] Optionally, the reinforcement structure includes a first reinforcement rib extending along the length direction of the plate body, and a second reinforcement rib extending along the width direction of the plate body.

[0008] Optionally, the reinforcement structure further includes a third reinforcement rib that is arranged obliquely relative to the first reinforcement rib and the second reinforcement rib, and the first reinforcement rib, the second reinforcement rib and the third reinforcement rib are connected to each other to form a pattern in the installation area.

[0009] Optionally, the BMS component includes a main board component and a slave board component, the installation area includes a main installation area and a secondary installation area, the main board component is installed in the main installation area, the slave board component is installed in the secondary installation area, and the graphic spans the main installation area and the secondary installation area.

[0010] Optionally, the pattern is formed by stamping the plate body so that the plate surface on one side facing the BMS component is recessed toward the other side.

[0011] Optionally, the plate surface of the plate body is further provided with a plurality of weight-reducing holes, and is further provided with reinforcing rib grooves surrounding and enclosing the peripheries of the weight-reducing holes.

[0012] Optionally, the reinforcing rib groove is formed by the plate surface of the plate body being recessed in a direction away from the BMS component.

[0013] Optionally, there is a preset distance between the inner periphery of the reinforcing rib groove and the periphery of the weight-reducing hole, and the preset distance is 3 mm-5 mm.

[0014] Optionally, a first connecting section is provided on the upper side of the plate body, and the first connecting section is provided with a first mounting hole;

[0015] The lower edge of the plate body is bent toward the plate surface to form a second connecting section, and the second connecting section is provided with a second mounting hole. The first mounting hole and the second mounting hole are both used for fasteners to pass through and fix the plate body.

[0016] The utility model also provides a battery pack, comprising:

[0017] Box;

[0018] A battery module is placed in the box and fixedly connected to the box;

[0019] A mounting bracket connected to the battery module; and

[0020] A BMS component and a BMS mounting plate as claimed in any one of claims 1 to 9, wherein the BMS component is fixed to the BMS mounting plate, and the BMS mounting plate is connected to the mounting bracket.

[0021] The technical solution of the utility model adopts the method of setting an installation area on the board surface of the board body, and the BMS component is connected and fixed to the board body and is located in the installation area; in order to ensure stable and beautiful installation, the area of ​​the BMS component is slightly smaller than the area of ​​the board body, that is, the part outside the range of the installation area has little effect on the structural strength of the board body, so that by setting a reinforcement structure in the installation area, the structural strength of the board body is increased compared with the existing BMS installation board, and the risk of cracking of the BMS installation board due to vibration is reduced; in addition, the setting of the reinforcement structure does not require the re-development of the BMS installation board or the re-development of the corresponding installation bracket, thereby reducing the cost of research and development and the cost of mold opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of an embodiment of a battery pack of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 for Figure 1 A structural schematic diagram of an embodiment of a BMS mounting plate.

[0026] Description of Figure Numbers:

[0027] Label name Label name 100 Battery Pack 812 Secondary installation area 200 Cabinet 820 Weight reduction hole 300 Battery Module 830 Strengthening rib groove 400 Mounting Bracket 840 First connection section 500 Electrical installation board 841 First mounting hole 700 BMS Components 850 Second connecting section 710 Motherboard components 851 Second mounting hole 720 From the board components 900 Strengthening the structure 800 BMS mounting plate 910 First reinforcement 810 Board body 920 Second reinforcement 811 Main installation area 930 The third reinforcement

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Due to the current demand for reducing the weight and cost of battery packs, the method currently commonly used is to reduce the weight of the box. This reduces the stability of the battery pack box, causing the battery module to vibrate easily. The BMS mounting plate is thin and is prone to excessive bending, stretching and other deformations during vibration, causing the BMS mounting plate to crack.

[0033] To this end, the utility model proposes a BMS mounting plate, aiming to reduce the risk of deformation and cracking of the BMS mounting plate.

[0034] Reference Figures 1 to 3 The battery pack 100 generally includes a box 200, a battery module 300, a BMS component 700, a mounting bracket 400 and a connector, etc. The BMS component 700 generally includes a housing and a circuit board arranged in the housing, which mainly receives and collects signals, such as receiving vehicle signals; collecting voltage, temperature and other signals of the battery module 300; the existing BMS component 700 is installed on the battery module 300, mainly by first fixing the BMS component 700 to the BMS mounting plate 800, the battery module 300 is provided with a mounting bracket 400, and then fixing the BMS mounting plate 800 with the BMS component 700 to the battery module 300 through the mounting bracket 400. The full name of BMS (Battery Management System) is the battery management system, which manages the charging and discharging of the battery to keep the battery in an optimal state. BMS is divided into master-slave type and integrated type according to different topological structures; the BMS component 700 described in this solution includes a main board component 710 and a slave board component 720.

[0035] Reference Figure 3 In one embodiment of the utility model, the BMS mounting plate 800 includes a plate body 810 and a reinforcing structure 900 arranged on the plate body 810, wherein an installation area is arranged on the plate surface of the plate body 810; the BMS component 700 is connected and fixed to the plate body 810 and is located in the installation area; and the reinforcing structure 900 is arranged in the installation area of ​​the plate body 810 to improve the structural strength of the plate body 810 in the installation area.

[0036] In order to facilitate the installation of the plate body 810, the plate body 810 is provided with a fixing portion for connecting with an external component to fix the plate body 810;

[0037] In one embodiment, the fixing portion is an external component, such as a bracket, a plate, a rod, etc., which is fixed to the plate body 810 by welding, locking, etc.

[0038] In another embodiment, the fixing portion is a structure of the plate body 810 itself, such as a folded edge formed by bending, a threaded hole formed by opening, etc.

[0039] Due to the current demand for reducing the weight and cost of the battery pack 100, it is currently generally achieved by reducing the weight of the box 200. This reduces the stability of the box 200 of the battery pack 100, causing the battery module 300 to easily vibrate. The BMS mounting plate 800 is relatively thin and is prone to excessive bending, stretching and other deformations during vibration, thereby causing the BMS mounting plate 800 to crack. The technical solution of the utility model adopts a mounting area set on the board surface of the board body 810, and the BMS component 700 is connected and fixed to the board body 810 and is located in the mounting area; in order to ensure stable and beautiful installation, the area of ​​the BMS component 700 is slightly smaller than the area of ​​the board body 810, that is, the part outside the range of the mounting area has little effect on the structural strength of the board body 810. In this way, by setting a reinforcing structure 900 in the mounting area, the structural strength of the board body 810 is increased compared with the existing BMS mounting plate 800, and the risk of cracking of the BMS mounting plate 800 due to vibration is reduced; in addition, the setting of the reinforcing structure 900 does not require the re-development of the BMS mounting plate 800, nor does it require the re-development of the corresponding mounting bracket 400, thereby reducing the cost of research and development and the cost of mold opening.

[0040] Regarding the arrangement of the reinforcement structure 900 .

[0041] In one embodiment, the reinforcement structure 900 may be formed by folding the BMS mounting plate 800 into multiple layers or a complex shape, thereby increasing the strength and stability of the structure of the BMS mounting plate 800 .

[0042] In another embodiment, the reinforcement structure 900 is a member of metal or other strong material embedded in the BMS mounting plate 800 to increase the strength and durability of the connection points of the BMS mounting plate 800 , thereby increasing the strength and stability of the structure of the BMS mounting plate 800 .

[0043] In another embodiment, the reinforcement structure 900 is to add reinforcement ribs on the surface or inside of the BMS mounting plate 800 to increase the rigidity and bending resistance of the BMS mounting plate 800. The reinforcement ribs can be in a planar shape, or in a shape such as an overlap, a folded edge, etc. In one embodiment, the reinforcement ribs are configured as structural reinforcement members, which refer to components arranged on the surface or inside of a structural member made of plastic, metal or other materials to improve the structural strength, rigidity and stability. They can be ribs or ribs arranged horizontally or longitudinally on the surface of the structure, or reinforcement rods or reinforcement ribs arranged inside.

[0044] In another embodiment, the reinforcing ribs are rib members formed by protrusions or depressions of the plate body 810. Rib members refer to strip-shaped members provided on the surface of a structure such as a plastic or a plate in a protruding or recessed manner, and are used to increase the bearing capacity and anti-deformation ability of the structure.

[0045] In this solution, the reinforcement structure 900 includes a first reinforcement rib 910 extending along the length direction of the plate body 810 , and a second reinforcement rib 920 extending along the width direction of the plate body 810 .

[0046] In one embodiment, the first reinforcing rib 910 extends in the middle of the plate body 810 in the length direction and is arranged in plurality in the width direction; the second reinforcing rib 920 extends in the width direction and is arranged to be spaced apart from the first reinforcing rib 910 .

[0047] In another solution, for the convenience of processing and manufacturing, and to ensure the quality of the BMS mounting plate 800, the reinforcing structure 900 further includes a third reinforcing rib 930 which is arranged obliquely relative to the first reinforcing rib 910 and the second reinforcing rib 920. The first reinforcing rib 910, the second reinforcing rib 920 and the third reinforcing rib 930 are connected to each other to form a pattern in the mounting area. The reinforcing rib is a pattern formed in the mounting area by stamping. The BMS mounting plate 800 is provided by stamping, which has high processing efficiency and good quality compared with other methods.

[0048] The inclination here does not have to be a straight line, but can be an arc, such as the third reinforcing rib 930 is curved.

[0049] Furthermore, the reinforcing rib is formed by the plate surface of the plate body 810 facing the BMS assembly 700 being recessed toward the other side. In this way, the plate surface of the reinforcing rib on the side contacting the BMS assembly 700 is flat and will not interfere with the BMS assembly 700.

[0050] Reference Figure 3 Specifically, in order to avoid the quality impact of the BMS mounting plate 800 caused by multiple processing, the BMS assembly 700 includes a main board assembly 710 and a slave board assembly 720, and the mounting area includes a main mounting area 811 and a secondary mounting area 812, and the pattern formed by the reinforcing ribs spans the main mounting area 811 and the secondary mounting area 812. If the reinforcing ribs are formed by stamping in the main mounting area 811 and the secondary mounting area 812 respectively, on the one hand, there are many processing steps and the processing efficiency is low; on the other hand, if there is stress concentration during the stamping process, such as at sharp corners or near the edge of the hole, the stress concentration will cause excessive local deformation and easily cause cracking. And because the BMS mounting plate 800 is usually thinner, only 1.8mm-2.5mm, too many stamping times will also affect the quality of the product. For example, factors such as stamping speed, mold design, and punch shape need to be reasonably selected to avoid excessive stress and cracking. In this way, the quality of the product is difficult to guarantee and the processing difficulty is also relatively large.

[0051] Specifically, the pattern can be closed or open. The setting of the pattern here is mainly to ensure the structural strength of the mounting plate, and can be designed according to the difficulty of actual manufacturing. The pattern can be a single combination of multiple rectangles, circles, prisms, etc., such as the concentric setting of inner and outer rectangles; or a cross combination, such as the scheme of outer rectangle and inner circle.

[0052] Furthermore, in order to meet the requirements of reducing weight and cost of the battery pack 100, the plate surface of the plate body 810 is also provided with a plurality of weight-reducing holes 820, and is also provided with reinforcing rib grooves 830 surrounding and enclosing the periphery of the weight-reducing holes 820. In this way, the reinforcing ribs of the BMS mounting plate 800 are formed by self-stamping, and the strength and stability of the structure are increased through the complex shape. On this basis, the weight-reducing holes 820 are provided to reduce the weight of the BMS mounting plate 800. In order to avoid affecting the structural strength of the BMS mounting plate 800, the reinforcing rib grooves 830 around the periphery of the weight-reducing holes 820 are provided. Compared with the existing BMS mounting plate 800 of the same thickness, this solution has a lower weight and higher structural stability.

[0053] Specifically, in order to facilitate the processing of the reinforcing rib groove 830 and to ensure that the structural strength of the BMS mounting plate 800 will not be reduced, the reinforcing rib groove 830 is arranged in the pattern formed by the reinforcing rib. Because it is located in the reinforcing rib, the process during the stamping process can be guaranteed, thereby reducing the factors affecting the quality during the stamping process. In addition, the reinforcing rib groove 830 can also cooperate with the reinforcing rib to improve the internal structural strength of the reinforcing rib pattern and improve the overall structural strength of the BMS mounting plate 800.

[0054] In addition, in order to facilitate the punching of the weight-reducing hole 820 and avoid affecting the quality of the BMS reinforcement plate, a preset distance is provided between the inner periphery of the reinforcement rib groove 830 and the periphery of the weight-reducing hole 820, and the preset distance is 3mm-5mm. If the preset distance is less than 3mm, on the one hand, the processing is difficult, and on the other hand, the quality after punching is difficult to ensure; if the preset distance is greater than 5mm, the weight-reducing hole 820 is too large, which easily increases the risk of cracking of the plate surface of the plate body 810, and the quality of the BMS mounting plate 800 is difficult to ensure.

[0055] Specifically, in order to avoid interference with the BMS assembly 700 , the reinforcing rib groove 830 is formed by the plate surface of the plate body 810 being recessed in a direction away from the BMS assembly 700 .

[0056] Furthermore, in order to facilitate the installation of the plate body 810, the fixing portion is configured as a first connecting section 840 arranged on the upper side of the plate body 810, and the first connecting section 840 is provided with a first mounting hole 841; the lower side edge of the plate body 810 is bent toward the plate surface to form a second connecting section 850, and the second connecting section 850 is provided with a second mounting hole 851, and the first mounting hole 841 and the second mounting hole 851 are both used for fasteners to pass through and fix the plate body 810.

[0057] In other embodiments, the fixing portion may be a bracket formed by welding; a protrusion is provided to facilitate installation or a nut welded on the end surface, etc.

[0058] Specifically, the battery module 300 is installed in the box body 200, the mounting bracket 400 is arranged on the upper end surface of the battery module 300, the battery module 300 is fixed to the box body 200, and the lower part of the mounting bracket 400 is arranged on the electrical installation board 500 for installing the power supply components, and the battery mounting board is locked and fixed with the lower box body 200 beam arranged at the bottom of the box body 200; during installation, the main board assembly 710 is first installed in the main installation area 811, and the slave board assembly 720 is installed in the secondary installation area 812, and the main installation area 811 and the secondary installation area 812 are provided with multiple bolt holes, and the reinforcing ribs are arranged to avoid the multiple bolt holes. The main board assembly 710 and the sub-board assembly 720 are bolted to the board surface and fixed to the board body 810 as a whole; then the first connecting section 840 of the board body 810 is locked with the mounting bracket 400 provided on the upper end surface of the battery module through fasteners, such as bolts; the second connecting section 850 of the board body 810 is locked with the electrical installation board 500 at the bottom through fasteners to complete the assembly of the BMS installation board 800. In this way, even if the battery module vibrates later, the structural strength of the board body 810 is increased due to the setting of the reinforcement structure 900, and the risk of cracking of the BMS installation board 800 due to vibration is reduced.

[0059] Reference Figure 1 and Figure 2 The utility model also proposes a battery pack 100, which includes a box 200, a battery module 300, a BMS assembly 700 and a BMS mounting plate 800. The specific structure of the BMS mounting plate 800 refers to the above embodiment. Since the battery pack 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery module 300 is placed in the box 200 and fixedly connected to the box 200; the mounting bracket 400 is connected to the battery module 300; the BMS assembly 700 is fixed to the BMS mounting plate 800, and the BMS mounting plate 800 is connected to the mounting bracket 400.

[0060] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A BMS mounting plate for mounting BMS components, characterized in that: The BMS mounting plate includes: A board body, wherein a mounting area is provided on the board surface of the board body; the BMS component is connected and fixed to the board body and is located in the mounting area; and The reinforcement structure is arranged in the installation area of ​​the plate body to improve the structural strength of the plate body.

2. The BMS mounting plate according to claim 1, characterized in that: The reinforcement structure includes a first reinforcement rib extending along the length direction of the plate body and a second reinforcement rib extending along the width direction of the plate body.

3. The BMS mounting plate according to claim 2, characterized in that: The reinforcement structure further includes a third reinforcement rib which is arranged obliquely relative to the first reinforcement rib and the second reinforcement rib. The first reinforcement rib, the second reinforcement rib and the third reinforcement rib are connected to each other to form a pattern in the installation area.

4. The BMS mounting plate according to claim 3, characterized in that: The BMS component includes a main board component and a slave board component, the installation area includes a main installation area and a secondary installation area, the main board component is installed in the main installation area, the slave board component is installed in the secondary installation area, and the graphic spans the main installation area and the secondary installation area.

5. The BMS mounting plate according to claim 3, characterized in that: The pattern is formed by punching the plate body so that the plate surface on one side facing the BMS component is recessed toward the other side.

6. The BMS mounting plate according to claim 1, characterized in that: The plate surface of the plate body is also provided with a plurality of weight-reducing holes, and is also provided with reinforcing rib grooves surrounding and enclosing the peripheries of the weight-reducing holes.

7. The BMS mounting plate according to claim 6, characterized in that: The reinforcing rib groove is formed by the plate surface of the plate body being recessed in a direction away from the BMS assembly.

8. The BMS mounting plate according to claim 7, characterized in that: There is a preset distance between the inner periphery of the reinforcing rib groove and the periphery of the weight-reducing hole, and the preset distance is 3 mm-5 mm.

9. The BMS mounting plate according to claim 1, characterized in that: A first connecting section is provided on the upper side of the plate body, and a first mounting hole is provided in the first connecting section; The lower edge of the plate body is bent toward the plate surface to form a second connecting section, and the second connecting section is provided with a second mounting hole. The first mounting hole and the second mounting hole are both used for fasteners to pass through and fix the plate body.

10. A battery pack, characterized in that: include: Box; A battery module is placed in the box and fixedly connected to the box; A mounting bracket connected to the battery module; and A BMS component and a BMS mounting plate as claimed in any one of claims 1 to 9, wherein the BMS component is fixed to the BMS mounting plate, and the BMS mounting plate is connected to the mounting bracket.

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