Busbar support assembly and battery module

Abstract

The utility model discloses a busbar support assembly and a battery module, the busbar support assembly comprises a busbar support, the busbar support is provided with a busbar and is suitable for being arranged on one side, provided with a pole, of a plurality of battery cells, and the busbar is used for being connected with the pole; the slave plate is arranged on the busbar bracket and is positioned on one side, far away from the battery core, of the busbar bracket, and the slave plate is electrically connected with the busbar; and the heat dissipation and heat insulation assembly is located between the slave plate and the busbar. According to the busbar support assembly, the influence of temperature rise of the busbar on the slave plate can be reduced, and the busbar support assembly is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a busbar bracket assembly and a battery module. Background Art

[0002] In related technologies, during the charging and discharging process of the battery cells, the temperature of the battery cells will rise sharply, and a large amount of heat will be transferred to the slave board through the bus, causing the slave board to continue working in a higher temperature environment, shortening the aging time of the slave board, and increasing the failure probability of the electrical components of the slave board, thereby easily causing scrap problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a busbar bracket assembly that can reduce the impact of busbar temperature rise on the slave plate, has a simple structure, and is low in cost.

[0004] Another object of the present invention is to provide a battery module having the above-mentioned busbar bracket assembly.

[0005] According to the embodiment of the present invention, the busbar bracket assembly includes: a busbar bracket, which is provided with a busbar and is suitable for being provided on a side of a plurality of battery cells provided with poles, and the busbar is used to connect the poles; a slave plate, which is provided on the busbar bracket and is located on a side of the busbar bracket away from the battery cells, and the slave plate is electrically connected to the busbar; and a heat dissipation and heat insulation component, which is located between the slave plate and the busbar.

[0006] According to the bus bracket assembly of the embodiment of the present invention, a bus is provided on the bus bracket, and a slave plate is provided on the bus bracket and located on the side of the bus bracket away from the battery cell, so that the bus bracket and the slave plate can be integrated, which makes the structure simple and effectively reduces the cost. The heat dissipation and heat insulation component is located between the slave plate and the bus. The heat dissipation and heat insulation component can reduce the impact of the bus temperature rise on the slave plate, extend the aging failure time of the slave plate, and is beneficial to extend the service life of the slave plate, ensuring the reliable operation of the battery module.

[0007] In addition, the busbar support assembly according to the above embodiment of the present invention may also have the following additional technical features:

[0008] According to the busbar support assembly of some embodiments of the present invention, the heat dissipation and heat insulation component is a heat dissipation element, and the heat dissipation element is connected to at least one of the busbar and the slave plate.

[0009] According to some embodiments of the present invention, the heat sink is a phase change material structure; or, the heat sink is a cold plate; or, the heat sink includes a stacked phase change material member and a cold plate, and the phase change material member is located on a side of the cold plate close to the bus and connected to the cold plate.

[0010] According to some embodiments of the present invention, the length of the slave plate is L1, the length of the heat sink is L2, and they satisfy: 1 / 3<L2 / L1<3 / 2; and / or, the width of the slave plate is W1, the width of the heat sink is W2, and they satisfy: 1 / 3<L1 / L2<3 / 2.

[0011] According to some embodiments of the present invention, the heat dissipation and heat insulation assembly is a heat insulation piece, which is connected to the slave plate and spaced apart from the bus bar.

[0012] According to some embodiments of the present invention, the gap between the thermal insulation member and the busbar is 1 mm-8 mm.

[0013] According to some embodiments of the present invention, the thermal insulation member is an aerogel member, a rigid polyurethane plate member or a foam member.

[0014] According to some embodiments of the present invention, the length of the sub-plate is L1, the length of the thermal insulation member is L3, and they satisfy: 1 / 2<L3 / L1<11 / 10; and / or, the width of the sub-plate is W1, the width of the thermal insulation member is W3, and they satisfy: 1 / 2<L3 / L1<11 / 10.

[0015] According to some embodiments of the present invention, the heat dissipation and heat insulation assembly includes: a heat dissipation member connected to the bus; and a heat insulation member located on a side of the heat dissipation member away from the bus and connected to the slave plate.

[0016] The battery module according to the embodiment of the present invention includes the busbar bracket assembly according to the embodiment of the present invention.

[0017] According to the battery module of the embodiment of the present invention, a bus is provided on the bus bracket, and the slave plate is provided on the bus bracket and located on the side of the bus bracket away from the battery cell, so that the bus bracket and the slave plate can be integrated, which makes the structure simple and effectively reduces the cost. The heat dissipation and heat insulation component is located between the slave plate and the bus. The heat dissipation and heat insulation component can reduce the impact of the bus temperature rise on the slave plate, extend the aging failure time of the slave plate, and is beneficial to extend the service life of the slave plate, ensuring the reliable operation of the battery module.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a partial structural diagram of a battery module according to the first embodiment of the present utility model;

[0021] Figure 2 is a partial cross-sectional view of a battery module according to a first embodiment of the present utility model;

[0022] Figure 3 is a partial cross-sectional view of a battery module according to a second embodiment of the present utility model;

[0023] Figure 4 is a partial structural diagram of a battery module according to a third embodiment of the present utility model;

[0024] Figure 5 It is a partial cross-sectional view of a battery module according to the third embodiment of the present invention.

[0025] Reference numerals:

[0026] 100, busbar bracket assembly; 200, battery cell; 300, battery module;

[0027] 10. Busbar bracket; 11. Busbar; 12. Hook;

[0028] 20. From the board;

[0029] 30. Heat dissipation and heat insulation components; 31. Heat dissipation components; 32. Heat insulation components;

[0030] 40. Adhesive. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, 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", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0033] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature include the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0034] The busbar support assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0035] Reference Figure 1-Figure 5 As shown, the busbar support assembly 100 according to an embodiment of the present invention may include: a busbar support 10 .

[0036] Specifically, a busbar 11 is provided on the busbar bracket 10, and the busbar bracket 10 is provided on one side of multiple (greater than or equal to two) battery cells 200 with poles. The busbar 11 can be connected to the poles to achieve the connection requirements of multiple battery cells 200, and the busbar bracket 10 can achieve the support and fixation requirements of the busbar 11.

[0037] In addition, if Figure 1-Figure 5 As shown, the busbar support assembly 100 further includes a slave plate 20, which is electrically connected to the busbar 11. The battery cell 200 can be detected by the slave plate 20 to meet the monitoring requirements of the battery cell 200, and the slave plate 20 is provided on the busbar support 10. The slave plate 20 is located on the side of the busbar support 10 away from the battery cell 200 (for example, Figure 2 As shown on the right side of the drawing, the busbar bracket 10 and the slave plate 20 can be integrated, which simplifies the structure and reduces the number of low-voltage wiring harnesses used, effectively reducing costs.

[0038] In related technologies, during the charging and discharging process of the battery cell, for example, when the battery cell is fast charged at a high rate, the temperature of the battery cell will rise sharply, and a large amount of heat will be transferred to the slave board through the bus, causing the slave board to continue working in a higher temperature environment, shortening the aging time of the slave board, and increasing the failure probability of the electrical components of the slave board, which makes it easy to cause scrap problems.

[0039] Therefore, in the present invention, if Figure 1-Figure 5 As shown, the bus bracket assembly 100 also includes a heat dissipation and heat insulation component 30, which is located between the slave plate 20 and the bus 11. The heat dissipation and heat insulation component 30 can reduce the impact of the temperature rise of the bus 11 on the slave plate 20, extend the aging failure time of the slave plate 20, and help extend the service life of the slave plate 20, ensuring the reliable operation of the battery module 300.

[0040] It should be noted that, for the convenience of description, the directions such as “left” and “right” in the present invention are based on the direction relationship shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0041] In some embodiments, the busbar support 10 is injection molded, so that the busbar support 10 has good structural strength, ensuring that the slave plate 20 and the busbar 11 are securely fixed to the busbar support 10 .

[0042] In the embodiment of the present invention, the specific connection method between the slave plate 20 and the busbar support 10 can be set according to actual conditions.

[0043] For example, in some embodiments, Figure 1-Figure 5 As shown, the bus bracket 10 is provided with a hook 12, and the slave plate 20 cooperates with the hook 12 to fix the slave plate 20 on the bus bracket 10, ensuring that the slave plate 20 is reliably fixed on the bus bracket 10. The structure is simple, easy to process and manufacture, and conducive to improving assembly efficiency.

[0044] For example, in some embodiments, the busbar support 10 is provided with a connection hole, and a fastener is provided through the slave plate 20 and connected to the connection hole, thereby securing the slave plate 20 to the busbar support 10, thereby ensuring that the slave plate 20 is securely secured to the busbar 11. For example, the fastener may be a plastic rivet, and the busbar support 10 and the slave plate 20 are riveted together.

[0045] For example, in some embodiments, the slave plate 20 and the busbar support 10 can be fixed to the busbar support 10 through interference fit, ensuring that the slave plate 20 is securely fixed to the busbar 11 .

[0046] In the embodiment of the present invention, the specific connection method of the busbar 11 and the busbar support 10 can be set according to actual conditions. For example, the busbar 11 and the busbar support 10 are connected by a hot press riveting process, or the busbar 11 and the busbar support 10 are connected by a snap connection.

[0047] According to the busbar bracket assembly 100 of the embodiment of the present invention, a busbar 11 is provided on the busbar bracket 10, and a slave plate 20 is provided on the busbar bracket 10 and is located on the side of the busbar bracket 10 away from the battery cell 200, so that the busbar bracket 10 and the slave plate 20 can be integrated, so that the structure is simple and the cost is effectively reduced. The heat dissipation and heat insulation component 30 is located between the slave plate 20 and the busbar 11. The heat dissipation and heat insulation component 30 can reduce the influence of the temperature rise of the busbar 11 on the slave plate 20, extend the aging failure time of the slave plate 20, and is beneficial to extend the service life of the slave plate 20, ensuring the reliable operation of the battery module 300.

[0048] In some embodiments of the present invention, Figure 3 As shown, the heat dissipation and heat insulation assembly 30 is a heat sink 31, which is connected to at least one of the busbar 11 and the slave plate 20, that is, the heat sink 31 is connected to the busbar 11, or the heat sink 31 is connected to the slave plate 20, or the heat sink 31 is connected to the busbar 11 and the slave plate 20, all of which can achieve the fixation of the heat sink 31, and the heat sink 31 can reduce the temperature of the busbar 11 and / or the slave plate 20, increase the heat dissipation rate of the busbar 11 and / or the slave plate 20, ensure that the temperature of the busbar 11 and the slave plate 20 is maintained within a low range, and ensure the long-term and effective normal operation of the battery module 300. At the same time, when the heat sink 31 is connected to the busbar 11 and the slave plate 20, the heat sink 31 can cool the busbar 11 and the slave plate 20 at the same time, effectively extending the service life of the slave plate 20 and ensuring the reliable operation of the battery module 300.

[0049] In some embodiments, as Figure 2 and Figure 3 As shown, the heat sink 31 is connected to at least one of the bus 11 and the slave plate 20 by bonding, or the heat sink 31 is connected to at least one of the bus 11 and the slave plate 20 by means of foam support, ensuring a reliable connection, and both can ensure that the heat sink 31 is tightly fitted to the bus 11 and / or the slave plate 20, achieving the purpose of rapid heat conduction. At the same time, when the heat sink 31 is connected to the slave plate 20 by bonding, the slave plate 20 can be separated from the bus 11, increasing the insulation capacity of the bus 11 and the slave plate 20, protecting the pins of the electrical components of the slave plate 20, and avoiding risks such as short circuits. For example, the adhesive 40 used for the bonding connection can be a thermally conductive adhesive, a thermally conductive structural adhesive, or a thermally conductive silicone grease, etc., which can ensure a thermally conductive effect.

[0050] According to some embodiments of the present invention, the heat sink 31 may be a phase change material structure. The phase change material structure can absorb a large amount of heat while maintaining a constant temperature, ensuring good heat dissipation for the busbar 11 and / or the slave plate 20. Furthermore, the structure is simple and occupies a small space, facilitating a miniaturized design of the battery module 300. For example, the phase change material structure may be paraffin wax or the like.

[0051] In some embodiments, the phase change material structure can use an organic phase change material (PCM) or a composite PCM. Appropriate materials can be selected according to different phase change temperature requirements. The composite PCM has high thermal conductivity, fast heat exchange, and stable shape, which makes the heat exchange effect good. For example, the battery cell 200 with a faster temperature rise can use a composite PCM.

[0052] Alternatively, the heat sink 31 may be a cold plate, which can ensure good cooling effect on the busbar 11 and / or the slave plate 20 and has a long service life, thereby facilitating ensuring the service life of the battery module 300 .

[0053] Alternatively, the heat sink 31 includes a phase change material member and a cold plate that are stacked, and the phase change material member is located on a side of the cold plate that is close to the bus bar 11 (eg Figure 2 The left side shown in the figure), and the phase change material is connected to the cold plate. By integrating the phase change material and the cold plate, the heat dissipation effect can be further improved, which is beneficial to extending the service life of the bus 11 and / or the slave plate 20.

[0054] In some embodiments, the length of the slave plate 20 is L1, the length of the heat sink 31 is L2, and they satisfy: 1 / 3<L2 / L1<3 / 2. Thus, the heat sink 31 can ensure the cooling effect on the bus 11 and / or the slave plate 20, and avoid the structure being too large and encroaching on the design space of other parts, thereby meeting the required setting requirements.

[0055] In some embodiments, as Figure 3 As shown, the width of the slave plate 20 is W1, the width of the heat sink 31 is W2, and they satisfy: 1 / 3<L1 / L2<3 / 2. Thus, the heat sink 31 can ensure the cooling effect on the bus 11 and / or the slave plate 20, and avoid the structure being too large to encroach on the design space of other parts, thereby meeting the required setting requirements.

[0056] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the heat dissipation and heat insulation component 30 is a heat insulation member 32, which is connected to the slave plate 20, and the heat insulation member 32 is spaced apart from the bus 11. The heat insulation member 32 can prevent the heat of the bus 11 from being transferred to the slave plate 20, thereby reducing the impact of the temperature rise of the bus 11 on the slave plate 20, avoiding problems such as electrical device failure or premature failure due to excessive temperature of the slave plate 20, and improving the reliability of the battery module 300.

[0057] In some embodiments, as Figure 5 As shown, the heat insulating member 32 is connected to the slave plate 20 by bonding, which ensures a reliable connection and can separate the slave plate 20 from the bus 11, thereby increasing the insulation capacity between the bus 11 and the slave plate 20, protecting the pins of the electrical components of the slave plate 20, and avoiding risks such as short circuits.

[0058] According to some embodiments of the present invention, Figure 5 As shown, the gap between the thermal insulation member 32 and the busbar 11 is 1mm-8mm, that is, the gap between the thermal insulation member 32 and the busbar 11 is X and satisfies 1mm≤X≤8mm. Within the above-mentioned size range, it is possible to prevent the surface of the busbar 11 from being covered by the thermal insulation board, thereby affecting the heat dissipation efficiency of the busbar 11, thereby preventing the heat of the busbar 11 from being transferred to the battery cell 200 and causing the temperature of the battery cell 200 to rise. This effectively extends the service life of the battery cell 200 and reduces safety hazards. At the same time, it can reduce the occupied space, avoid causing space waste in the battery module 300, and help improve the volume energy density of the battery module 300. For example, in some specific embodiments, the gap between the thermal insulation member 32 and the busbar 11 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, etc.

[0059] In some embodiments of the present invention, the thermal insulation member 32 may be an aerogel member, a rigid polyurethane plate member or a foam member, all of which have low thermal conductivity, low thermal resistance and insulation effects, can meet the required usage requirements, ensure good thermal insulation effect, and can improve the reliability of the battery module 300.

[0060] Among them, the aerogel parts have good thermal insulation effect, meet the required thermal insulation needs, and can meet the flame retardant requirements, such as meeting the flame retardant requirements of V0 level, ensuring safety of use; the rigid polyurethane panels have low thermal conductivity, simple process, and are easy to process and manufacture; the foam parts are compressible, can absorb assembly tolerances, are easy to assemble, and have low cost, which can reduce the production cost of the bus bracket assembly 100. For example, when the flame retardant requirements are high, silicone foam can be used.

[0061] In some embodiments, as Figure 4As shown, the length of the plate 20 is L1, the length of the thermal insulation member 32 is L3, and they satisfy: 1 / 2<L3 / L1<11 / 10. Thus, while the thermal insulation member 32 can play a better role in isolating heat, it can avoid the structure being too large and encroaching on the design space of other parts, and reduce material waste, which is conducive to reducing production costs.

[0062] In some embodiments, as Figure 5 As shown, the width of the plate 20 is W1, the width of the thermal insulation member 32 is W3, and they satisfy: 1 / 2<L3 / L1<11 / 10. Thus, while the thermal insulation member 32 can better isolate heat, it can avoid the structure being too large and encroaching on the design space of other parts, and reduce material waste, which is conducive to reducing production costs.

[0063] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the heat dissipation and heat insulation assembly 30 includes a heat dissipation member 31 and a heat insulation member 32. The heat dissipation member 31 is connected to the bus 11 to fix the heat dissipation member 31. The heat insulation member 32 is located on the side of the heat dissipation member 31 away from the bus 11 (for example, Figure 2 The heat insulating member 32 is connected to the slave plate 20, so that the heat insulating member 32 can be fixed. The heat insulating member 32 can isolate the heat of the bus 11 from being transferred to the slave plate 20, and the heat dissipating member 31 can reduce the temperature of the bus 11, thereby increasing the heat dissipation rate of the bus 11 and ensuring the working reliability of the battery module 300.

[0064] The battery module 300 according to the embodiment of the present invention includes the busbar bracket assembly 100 according to the embodiment of the present invention. Since the busbar bracket assembly 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the battery module 300 according to the embodiment of the present invention can realize the integration of the busbar bracket 10 and the slave board 20 by providing the busbar 11 on the busbar bracket 10 and providing the slave board 20 on the side of the busbar bracket 10 away from the battery cell 200, thereby simplifying the structure and effectively reducing the cost. The heat dissipation and heat insulation component 30 is located between the slave board 20 and the busbar 11. The heat dissipation and heat insulation component 30 can reduce the influence of the temperature rise of the busbar 11 on the slave board 20, thereby extending the aging failure time of the slave board 20, and is conducive to extending the service life of the slave board 20, ensuring the reliable operation of the battery module 300.

[0065] In some embodiments, the battery module 300 may be a lithium-ion battery. Lithium-ion batteries have high energy density, low internal resistance, and high safety, and can meet the required usage requirements.

[0066] In some embodiments, the battery module 300 can be used in a vehicle. By integrating the busbar support 10 and the slave board 20, the vehicle's battery management system (BMS) can be integrated. The heat dissipation and insulation assembly 30 can reduce the impact of the busbar 11 temperature rise on the slave board 20, extending the aging failure time of the slave board 20, thereby extending the service life of the slave board 20 and ensuring reliable operation of the battery module 300. For example, the vehicle is a new energy vehicle.

[0067] Other structures and operations of the busbar support assembly 100 and the battery module 300 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0068] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0069] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A busbar bracket assembly, characterized in that: include: A busbar support, wherein the busbar support is provided with a busbar and is suitable for being provided on one side of a plurality of battery cells provided with poles, the busbar being used to connect the poles; a slave board, the slave board being provided on the busbar support and located on a side of the busbar support away from the battery core, the slave board being electrically connected to the busbar; A heat dissipation and heat insulation component is located between the slave plate and the bus bar.

2. The busbar support assembly according to claim 1, characterized in that: The heat dissipation and heat insulation assembly is a heat dissipation element, and the heat dissipation element is connected to at least one of the bus bar and the slave plate.

3. The busbar support assembly according to claim 2, characterized in that: The heat sink is a phase change material structure; Alternatively, the heat sink is a cold plate; Alternatively, the heat sink includes a phase change material element and a cold plate that are stacked, and the phase change material element is located on a side of the cold plate close to the bus bar and connected to the cold plate.

4. The busbar support assembly according to claim 2, characterized in that: The length of the slave plate is L1, the length of the heat sink is L2, and they satisfy: 1 / 3<L2 / L1<3 / 2; And / or, the width of the slave plate is W1, the width of the heat sink is W2, and the following relationship is satisfied: 1 / 3<L1 / L2<3 / 2.

5. The busbar support assembly according to claim 1, characterized in that: The heat dissipation and heat insulation component is a heat insulation piece, which is connected to the slave plate and spaced apart from the bus bar.

6. The busbar support assembly according to claim 5, characterized in that: The gap between the heat insulating member and the bus bar is 1 mm to 8 mm.

7. The busbar support assembly according to claim 5, characterized in that: The heat insulating member is an aerogel member, a hard polyurethane plate member or a foam member.

8. The busbar support assembly according to claim 5, characterized in that: The length of the follower plate is L1, the length of the thermal insulation member is L3, and they satisfy: 1 / 2<L3 / L1<11 / 10; And / or, the width of the secondary plate is W1, the width of the thermal insulation member is W3, and they satisfy: 1 / 2<L3 / L1<11 / 10.

9. The busbar support assembly according to claim 1, characterized in that: The heat dissipation and heat insulation component comprises: a heat sink connected to the busbar; A heat insulating member is located on a side of the heat dissipating member away from the bus bar and is connected to the slave plate.

10. A battery module, characterized in that: It comprises a busbar support assembly according to any one of claims 1-9.

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