BMS support and battery pack

Abstract

The utility model relates to a BMS support and a battery pack, the BMS support is applied to the battery pack, the battery pack comprises a battery module, a box body and a battery management system, the battery module comprises a battery cell integrated assembly and a plurality of battery cells, and the BMS support comprises a support body; the first supporting part is connected with the first end of the bracket body in a bending manner and is used for supporting the battery cell integrated component; the second supporting part is connected with the second end of the bracket body in a bending manner and is used for supporting the battery management system; the first end of the support body and the second end of the support body are oppositely arranged. According to the utility model, both the battery cell integrated assembly and the battery management system can be supported, and the diversity of support functions is realized.

Description

Technical Field

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

[0002] In the related art, the battery management system (BMS) is fixed in the battery module by a bracket. The mainstream battery management systems are divided into two types: horizontal and vertical, and different types of battery management systems have different installation methods. When the battery management system is horizontal, the main board and the slave board are usually required to be stacked and assembled; when the battery management system is vertical, the bracket and the battery management system are usually required to be assembled back to back. However, both brackets in the related art can only install the battery management system, and the function is relatively single. Utility Model Content

[0003] In view of this, the utility model proposes a BMS bracket and a battery pack, which can realize the diversity of bracket functions.

[0004] In the first aspect, an embodiment of the utility model provides a BMS bracket, which is applied to a battery pack, the battery pack comprising a battery module, a case and a battery management system, the battery module comprising a battery cell integrated assembly and a plurality of battery cells, the BMS bracket comprising: a bracket body; a first support portion, which is bent and connected to the first end of the bracket body and is used to support the battery cell integrated assembly; a second support portion, which is bent and connected to the second end of the bracket body and is used to support the battery management system; wherein the first end of the bracket body and the second end of the bracket body are arranged opposite to each other.

[0005] In a second aspect, an embodiment of the utility model provides a battery pack, which includes a battery module and the BMS bracket.

[0006] By providing a bracket body, a first support part and a second support part, and using the first support part to support the battery cell integrated component and using the second support part to support the battery management system, various aspects of the utility model can realize the diversity of bracket functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0008] Figure 1 A front view schematic diagram of a BMS bracket according to an embodiment of the utility model is shown.

[0009] Figure 2 A rear view schematic diagram of a BMS bracket according to an embodiment of the utility model is shown.

[0010] Figure 3 A side view schematic diagram of a BMS bracket according to an embodiment of the utility model is shown.

[0011] Figure 4 A schematic diagram showing a box body according to an embodiment of the utility model.

[0012] Figure 5 A partial enlarged view of the BMS bracket after installation according to an embodiment of the utility model is shown.

[0013] Figure 6 A schematic diagram showing a first battery module of an embodiment of the utility model installed in a box.

[0014] Figure 7 A partial enlarged view showing the first battery module of an embodiment of the utility model installed in a box.

[0015] Figure 8 A schematic diagram showing a second battery module of an embodiment of the present utility model installed in a box.

[0016] Fig. 9 A partial enlarged view showing the second battery module of the embodiment of the utility model installed in the box. DETAILED DESCRIPTION

[0017] 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 in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0018] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly defined, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials. In some instances, methods, means, components and circuits well known to those skilled in the art are not described in detail, so as to highlight the main purpose of the utility model.

[0021] The utility model mainly provides a BMS bracket, which is applied to a battery module, the battery module is located on a box, and the battery module includes a cell contact system (CCS) and a battery management system. In the utility model, the BMS bracket can be used to install the battery management system and to support the cell integrated assembly.

[0022] Figure 1 A front view schematic diagram of a BMS bracket according to an embodiment of the utility model is shown. Figure 1 As shown, the BMS bracket of the present invention includes: a bracket body 11 , a first supporting portion 12 and a second supporting portion 15 .

[0023] In one embodiment, the bracket body 11 may be of an irregular shape, and the end surface of the bracket body 11 may be a curved surface or a smooth plane. The bracket body 11 may be axially symmetrical about its midline.

[0024] In one embodiment, the first support portion 12 is bent and connected to the first end of the support body 11 and is located on the side of the crossbeam of the box body to support the battery cell assembly. The first end of the support body 11 may be the upper end of the support body 11.

[0025] The first support portion 12 includes a first connection portion 121 and a first support sub-portion 122. The first connection portion may be a curved surface for transitional connection between the first support sub-portion 122 and the first end of the bracket body 11, and the first support sub-portion 122 is used to support the battery cell integrated assembly.

[0026] In one embodiment, the second support portion 15 is connected to the second end of the bracket body 11 by bending, and is located on the side of the longitudinal beam of the box body, for supporting the battery management system. The second end of the bracket body 11 may be the lower end of the bracket body 11 .

[0027] The second support portion 15 includes a second connecting portion 151 and a second supporting sub-portion 152. The second connecting portion may be an arc surface, which is used for transitional connection between the second supporting sub-portion 152 and the second end of the bracket body 11, and the second supporting sub-portion 152 is used to support the battery management system.

[0028] In one embodiment, the first end of the bracket body 11 and the second end of the bracket body 11 are arranged opposite to each other along the width direction of the battery module. The first support portion 12 extends along the first direction toward one side of the bracket body 11, and the second support portion 15 extends along the first direction toward the other side of the bracket body 11. The extension direction of the first support portion 12 is opposite to the extension direction of the second support portion 15, so as to avoid interference between the battery cell integrated assembly and the battery management system. In other words, the direction in which the first support portion 12 extends parallel to the longitudinal beam is opposite to the direction in which the second support portion 15 extends parallel to the longitudinal beam. Among them, the curvature of the first connecting portion 121 and the second connecting portion 151 are opposite.

[0029] Figure 2 A rear view schematic diagram of a BMS bracket according to an embodiment of the utility model is shown. Figure 3 A schematic side view of a BMS bracket according to an embodiment of the utility model is shown. Figure 1 and Figure 3 The BMS bracket of the utility model can be a snake-shaped or S-shaped structure when viewed from the side.

[0030] In one embodiment, two second support portions may be provided, and the two second support portions are spaced apart and arranged at the second end of the bracket body along the direction in which the cross beam extends. Figure 1As shown, the BMS bracket may further include another second supporting portion 16, and one second supporting portion 15 and another second supporting portion 16 are arranged at intervals at the second end of the bracket body along the extending direction of the crossbeam.

[0031] The second support portion 16 includes a second connecting portion 161 and a second supporting sub-portion 162. The second connecting portion may be an arc surface, which is used for transitional connection between the second supporting sub-portion 162 and the second end of the bracket body 11, and the second supporting sub-portion 162 is used to support the battery management system.

[0032] Furthermore, the BMS bracket further includes: a third support portion 13, which is bent and connected to the first end of the bracket body 11 and is located on the side of the crossbeam of the box body. The height of the third support portion 13 is less than the height of the first support portion 12, and is used to fix the bracket body 11 to the crossbeam of the box body. The height of the first support portion 12 is Figure 4 Similarly, the third support portion 13 is also Figure 4 Since the height of the third support portion 13 is less than that of the first support portion 12, the pressure of the battery cell assembly can fall on the first support portion 12 instead of the third support portion 13. The third support portion 13 plays a role in fixing the support body 11 and the crossbeam of the box body. The first support portion 12 and the third support portion 13 do not interfere with each other, thereby improving the stability of the support structure.

[0033] The third support portion 13 includes a third connection portion 131 and a third support sub-portion 132. The third connection portion 131 may be an arc surface, which is used for transitional connection between the third support sub-portion 132 and the first end of the bracket body 11, and the third support sub-portion 132 may be fixed on the crossbeam of the box body. The connection 123 between the third support portion 13 and the bracket body 11 may be a twisted arc surface, and the connection 124 between the third support portion 14 and the bracket body 11 may also be a twisted arc surface. The degree of twisting may be determined according to the actual structure, and the present utility model does not limit this.

[0034] In one embodiment, two third support portions are provided, and the two third support portions are spaced apart and arranged at the first end of the bracket body 11 along the direction in which the cross beam extends. Figure 1 As shown, the BMS bracket may further include another third support portion 14 , and one third support portion 13 and another third support portion 14 are arranged at intervals at the first end of the bracket body 11 along the extending direction of the crossbeam.

[0035] The third support portion 14 includes a third connection portion 141 and a third support sub-portion 142. The third connection portion 141 may be an arc surface for transitional connection between the third support sub-portion 142 and the first end of the bracket body 11, and the third support sub-portion 142 may be fixed on the crossbeam of the box body.

[0036] In one embodiment, the extension direction of the first support portion 12 is the same as the extension direction of the third support portion 13 , so the first support sub-portion 122 and the third support sub-portion 132 may be located on the same side of the bracket body 11 .

[0037] In one embodiment, the BMS bracket further includes: a fourth support portion 17, which is disposed on one side of the bracket body 11 and between the first support portion 12 and the second support portion 15, so as to facilitate the structural arrangement and installation of the battery management system. The fourth support portion 17 is bent and connected to one end of the bracket body 11 disposed along the height direction of the battery module, and is used to fix the corresponding tie.

[0038] The fourth support portion 17 includes a fourth connection portion 171 and a fourth support sub-portion 172. The fourth connection portion 171 may be an arc surface for transitional connection between the fourth support sub-portion 172 and the first end of the bracket body 11, and the fourth support sub-portion 172 may be used to fix a corresponding strap.

[0039] In one embodiment, two fourth supporting portions are provided, and the two fourth supporting portions are provided at two ends of the bracket body 11 along the direction in which the cross beam extends. Figure 1 As shown, the BMS support may further include another fourth support portion 18 , and one fourth support portion 17 and another fourth support portion 18 are arranged at two ends of the support body 11 along the extending direction of the cross beam.

[0040] The fourth support portion 18 includes a fourth connection portion 181 and a fourth support sub-portion 182. The fourth connection portion 181 may be an arc surface, which is used for transitional connection between the fourth support sub-portion 182 and the first end of the bracket body 11, and the fourth support sub-portion 182 may be used to fix the corresponding cable tie. By providing the fourth support portion, the BMS bracket of the utility model can further meet the wiring harness installation and fixation, and enrich the bracket function.

[0041] It should be noted that the heights of the two fourth support portions of the BMS bracket may be different. Figure 4 The height in the z direction. Figure 3For example, the height of the fourth supporting sub-portion 172 is greater than the height of the fourth supporting sub-portion 182, so that the adjacent fourth supporting portions of two adjacent BMS brackets can be misaligned, thereby reducing the risk of interference between the cable ties.

[0042] In one embodiment, the second support portion, the third support portion, and the fourth support portion all have corresponding through holes. Figure 1 As shown, the second support portion 15 has a corresponding first through hole 150, the second support portion 16 is provided with a through hole 160, the third support portion 13 is provided with a through hole 130, the third support portion 14 is provided with a through hole 140, the fourth support portion 17 is provided with a through hole 170, and the fourth support portion 18 is provided with a through hole 180. Optionally, the through hole on the second support portion is hexagonal, and the through holes of the third support portion and the fourth support portion are both circular. The through hole on the second support portion is set to be hexagonal, which can cooperate with the insertion of the hexagonal rivet, but it can be understood that in some embodiments, the through hole of the present application can also be of other shapes.

[0043] Figure 4 A schematic diagram of a box body according to an embodiment of the present utility model is shown. Figure 4 As shown, the box body 2 of the present invention may include a crossbeam 21 and a longitudinal beam 22. The crossbeam 21 may be arranged along Figure 4 The longitudinal beam 22 can be arranged along the y direction (or the width direction of the battery module, the second direction) in the Figure 4 The x direction (i.e., the first direction) is set in the height direction of the battery module, and the z direction (i.e., the third direction) is set in the height direction of the battery module. It is worth noting that Figure 4 The cross beam 21 can be arranged in parallel with three beams, and the box body 2 can also include a longitudinal beam 23, and the longitudinal beam 22 and the longitudinal beam 23 have different lengths. The longitudinal beam 23 can also be arranged in parallel with three beams, and the three cross beams 21 and the three longitudinal beams 23 can form a field-shaped structure, and multiple cells of the cell module can be placed on the field-shaped structure. As specifically illustrated in the figure, the cross beam of the utility model refers to the cross beam 21 located at the edge, and the longitudinal beam refers to the shorter longitudinal beam 22.

[0044] In one embodiment, the box body has a plurality of longitudinal beams 22, and the plurality of longitudinal beams 22 are connected to the cross beam 21 of the box body, wherein each longitudinal beam 22 is provided with at least one BMS bracket on the side along the extension direction of the cross beam 21. The BMS bracket is formed by sheet metal stamping. By using sheet metal stamping, the BMS bracket and the box body can be integrated into one piece, thereby improving production efficiency.

[0045] In one embodiment, the box body 2 of the utility model may further include an outer frame 24. The plurality of longitudinal beams 22 are respectively connected to the outer frame 24 and the cross beams 21 adjacent to the outer frame 24. The outer frame 24 may be provided with a liquid inlet, a liquid outlet, a communication interface, a high-voltage interface, etc., to facilitate the entry and exit of the cooling medium and the processing of signals.

[0046] Figure 5 A partial enlarged view of the BMS bracket after installation according to an embodiment of the utility model is shown. Figure 5 yes Figure 4 The partial enlarged view of part A in the middle shows that in part A, there are two BMS brackets installed on the crossbeam 21. The fourth supporting sub-parts 172 and 182 adjacent to the two BMS brackets have different heights, and the two cross but do not interfere with each other in a top view.

[0047] In one embodiment, the second support portion 15 has a corresponding first through hole 150, and the first through hole 150 of the second support portion 15 is used for a rivet nut 1500 to pass through to fix the second support portion 15 and the battery management system 33; and / or, the third support portion 13 has a corresponding second through hole, and the second through hole 130 of the third support portion 13 is used for a blind rivet 1300 to pass through to fix the third support portion 13 and the box body 2.

[0048] The through hole of the second support portion is used for a rivet nut to pass through to fix the second support portion and the longitudinal beam, and the through hole of the third support portion is used for a blind rivet to pass through to fix the third support portion and the cross beam. Figure 5 In the embodiment, the first through hole 150 of the second support portion 15 is used for a rivet nut 1500 to pass through to fix the second support portion 15 and the battery management system (33). The through hole 130 of the third support portion 13 is used for a blind rivet 1300 to pass through to fix the third support portion 13 and the crossbeam 21. By fixing the third support portion and the crossbeam with a blind rivet, bolts can be omitted, the structure is simpler, and the cost is lower.

[0049] Figure 6 A schematic diagram showing the first battery module of the utility model embodiment installed in a box. Figure 6 As shown, the battery module 3 may include a high-voltage box 34 in addition to a plurality of battery cells 31, a battery cell integrated assembly 32, and a battery management system 33. The plurality of battery cells 31 are arranged in a matrix. The high-voltage box 34 may be disposed on the corresponding longitudinal beam 22. The communication interface and the high-voltage interface on the outer frame 24 may be electrically connected to the high-voltage box 34.

[0050] Figure 7 A partial enlarged view showing the first battery module of an embodiment of the utility model installed in a box. Figure 7 yes Figure 6 A partial enlarged view of part A in the figure. Figure 7 As shown, the battery cell integrated assembly 32 includes a printed circuit board 321, which is fixed to the first support portion 12 and extends to be opposite to the second support portion 15, and the battery management system 33 is fixed to the second support portion 15 and connected to the printed circuit board 321, so that the overall structure can be compact and space-saving. The battery cell integrated assembly 32 also includes a connector 322, and the printed circuit board 321 is electrically connected to the plurality of battery cells 31 through the connector 322. The printed circuit board 321 is fixed to the first support portion 12 by gluing or rivets.

[0051] See also Figure 7 The through hole 180 of the fourth support portion 18 is used for the cable tie 332 to pass through and fix the cable tie. The battery management system 33 also has a connecting hole 333 and a wiring harness 331. The rivet nut 1500 passes through the connecting hole 333 and the first through hole 150 of the second support portion at the same time to fix the second support portion 15, the longitudinal beam 22 and the battery management system 33. The cable tie 332 is connected to the wiring harness 331, and the wiring harness 331 is connected to the high-voltage box 34. The cable tie 332 can be used for bundling the wiring harness 331.

[0052] Figure 8 A schematic diagram showing a second battery module of an embodiment of the present utility model installed in a box. Figure 8 and Figure 6 The main difference is the viewing angle and the schematic of the battery management system. Fig. 9 A partial enlarged view showing the second battery module of the embodiment of the utility model installed in the box. Fig. 9 yes Figure 8 A partial enlarged view of part B.

[0053] like Fig. 9 As shown, the battery management system 33 is directly connected to the printed circuit board 321, and the height of the first support portion 12 is greater than the height of the terminal 330 of the battery management system 33 to prevent the terminal 330 from being squeezed by the printed circuit board 321. The terminal 330 will not be affected by the force of the printed circuit board 321, so that the structure of the entire battery is more stable, and the connection method is simple, which can further save space.

[0054] In addition, the utility model further provides a battery pack, which includes a battery module and the BMS bracket. It can be understood that the utility model does not limit other components of the battery pack.

[0055] In summary, the embodiment of the utility model sets a bracket body, a first support part and a second support part, and sets the first end of the bracket body and the second end of the bracket body relatively along the width direction of the battery module. The direction in which the first support part extends parallel to the longitudinal beam is opposite to the direction in which the second support part extends parallel to the longitudinal beam. The first support part can be used to support the battery cell integrated component, and the second support part can be used to support the battery management system, thereby realizing the diversity of the bracket function, matching the CTP structure design, and simplifying the bracket structure. At the same time, since the first support part and the second support part are located on different sides of the bracket body, the supporting force distribution is more uniform and the bracket as a whole is more stable.

[0056] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] The BMS bracket and battery pack provided in the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A BMS bracket, characterized in that: The BMS bracket (1) is applied to a battery pack, the battery pack comprising a battery module (3), a box (2) and a battery management system (33), the battery module (3) comprising a battery cell integrated component (32) and a plurality of battery cells, and the BMS bracket (1) comprises: A support body (11); A first supporting portion (12) is bent and connected to the first end of the support body (11) and is used to support the battery cell integrated assembly (32); A second supporting portion (15) is bent and connected to the second end of the bracket body (11), and is used to support the battery management system (33); Wherein, the first end of the bracket body (11) and the second end of the bracket body (11) are arranged opposite to each other.

2. The BMS bracket according to claim 1, characterized in that: The BMS support (1) further comprises: The third support portion (13) is bent and connected to the first end of the bracket body (11); the height of the third support portion (13) is smaller than the height of the first support portion (12), and is used to fix the bracket body (11) and the box body (2).

3. The BMS bracket according to claim 1, characterized in that: The first support portion (12) extends along a first direction toward one side of the bracket body (11), and the second support portion (15) extends along the first direction toward the other side of the bracket body (11), and the extension direction of the first support portion (12) is opposite to the extension direction of the second support portion (15).

4. The BMS bracket according to claim 1, characterized in that: Two second supporting parts (15) are arranged at intervals, and the body of the battery management system (33) is inserted between the two second supporting parts (15).

5. The BMS bracket according to claim 1, characterized in that: The BMS support (1) further comprises: A fourth supporting portion (17) is bent and connected to the support body (11); The fourth supporting portion (17) has a corresponding through hole, and the through hole (170) of the fourth supporting portion (17) is used for the cable tie (332) to pass through so as to fix the cable tie (332).

6. The BMS bracket according to claim 5, characterized in that: The fourth support portion (17) is disposed on one side of the bracket body (11) and is located between the first support portion (12) and the second support portion (15).

7. The BMS bracket according to claim 2, characterized in that: The second supporting portion (15) has a corresponding first through hole (150), and the first through hole (150) of the second supporting portion (15) is used for a rivet nut (1500) to pass through so as to fix the second supporting portion (15) and the battery management system (33); And / or, the third support portion (13) has a corresponding second through hole, and the second through hole (130) of the third support portion (13) is used for a blind rivet (1300) to pass through to fix the third support portion (13) and the box body (2).

8. A battery pack, characterized in that: The battery pack comprises a BMS bracket (1) as described in any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: The battery cell integrated component (32) comprises a printed circuit board (321), the printed circuit board (321) being fixed to the first support portion (12) and extending to be opposite to the second support portion (15), and the battery management system (33) being fixed to the second support portion (15) and connected to the printed circuit board (321).

10. The battery pack according to claim 9, characterized in that: The battery management system (33) is directly plug-connected to the printed circuit board (321), and the height of the first support portion (12) is greater than the height of the terminal (330) of the battery management system (33) to prevent the terminal (330) from being squeezed by the printed circuit board (321).

Images