CN218333981U - Battery pack and electric vehicle - Google Patents

Abstract

The utility model relates to a battery package and electric motor car, wherein, the battery package includes BMS components and parts, BMS box, water-cooling board, BMS hardboard, battery package box, water-cooling board and battery package box are connected, the BMS box with the water-cooling board welding, the BMS hardboard with the BMS box is connected, BMS components and parts install in on the BMS hardboard, the box space intussuseption of BMS box is filled with heat-conducting glue, wherein, heat-conducting glue with the BMS box BMS components and parts, BMS hardboard contact. This application has the installation simply, BMS's radiating efficiency is high and BMS is high advantage of equalizing efficiency.

Description

Battery pack and electric vehicle

Technical Field

The application relates to a power battery, in particular to a battery pack and an electric vehicle.

Background

At present, in current battery package, the BMS box needs to be connected with the battery package box through BMS support and fixing bolt, therefore there is this defect of BMS support and fixing bolt that BMS box and battery package box are connected to prior art.

On the other hand, in the existing battery pack, the equalizing resistors in the BMS radiate heat by natural cooling, and this method has the disadvantage of low heat radiation efficiency, which in turn reduces the equalizing efficiency of the BMS.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery package and electric motor car, this battery package and electric motor car can fix the BMS box on the water-cooling board, and then through the water-cooling board with battery package box connection, realize not using under BMS support and fixing bolt's the prerequisite, fix the BMS box on battery package box. On the other hand, this application still is used for overcoming this BMS radiating efficiency low, balanced inefficiency's technical problem.

In a first aspect, the application provides a battery pack, the battery pack comprises a BMS component, a BMS box body, a water cooling plate, a BMS hard plate and a battery pack box body, the water cooling plate is connected with the battery pack box body, the BMS box body is welded with the water cooling plate, the BMS hard plate is connected with the BMS box body, the BMS component is installed on the BMS hard plate, the box space of the BMS box body is filled with heat-conducting glue, wherein the heat-conducting glue is contacted with the BMS box body, the BMS component and the BMS hard plate.

In this application first aspect, because water cooling board and battery package box connection, the BMS box welds with the water cooling board, so just can fix the BMS box on the battery package box under the prerequisite that does not use BMS support and fixing bolt.

On the other hand, because the BMS box with the water-cooling plate welding, BMS hardboard are connected with the BMS box, and BMS components and parts are installed on the BMS hardboard, and the box space intussuseption of BMS box is filled with heat-conducting glue, heat-conducting glue with the BMS box BMS components and parts, BMS hardboard contact, consequently, BMS components and parts just can transmit the BMS box through heat-conducting glue at the produced heat of during operation, and then transmit on the water-cooling plate through the BMS box, and then take away the produced heat of BMS components and parts at the during operation through water-cooling plate, finally improve the radiating efficiency of BMS to overcome this technical problem of the BMS balanced inefficiency that the radiating efficiency of BMS components and parts leads to.

Compared with the prior art, this application has the installation simply, BMS's radiating efficiency is high and the balanced efficient advantage of BMS.

In an optional embodiment, the upper surface of the water cooling plate is provided with a welding notch, and the water cooling plate is welded with the BMS box body through the welding notch.

In this alternative embodiment, the BMS box can be welded to the water cooled panel by a welding notch provided on the upper surface of the water cooled panel.

In an optional embodiment, the BMS box body comprises limiting grounding ribs fixed at the left and right ends of the BMS box body, wherein adjacent limiting grounding ribs form limiting grooves, and the left and right ends of the BMS hard plate are clamped with the limiting grooves.

In this alternative embodiment, since the limiting ground ribs are fixed at the left and right ends of the BMS case, wherein the adjacent limiting ground ribs form limiting grooves, the left and right ends of the BMS hard board can be engaged with the limiting grooves.

In an alternative embodiment, the battery pack further includes grounding nickel tabs fixed to left and right ends of the BMS rigid board;

the grounding nickel sheet comprises a welding part and an elastic deformation part, wherein the welding part is connected with the BMS hard board, and the left end and the right end of the elastic deformation part are connected with the welding part.

In this optional implementation, through the ground connection nickel piece, the BMS hardboard can with BMS box and battery package box equipotential ground, wherein, through the weld part, the ground connection nickel piece can be connected with the BMS hardboard, through the end with the elastic deformation portion of weld part connection, can be convenient for be connected BMS hardboard and spacing groove, and need not be connected BMS hardboard and BMS box through the bolt.

In an alternative embodiment, the left and right ends of the elastic deformation portion are provided with guide angles.

In this alternative embodiment, since the left and right ends of the elastic deformation part are provided with the guide angles, the left and right ends of the elastic deformation part can be conveniently inserted into the stopper grooves at the left and right ends of the BMS case through the guide angles.

In an optional embodiment, the grounding nickel plate is further provided with an exhaust groove.

In this alternative embodiment, since the grounding nickel plate is further provided with the exhaust grooves, gas generated by welding can be exhausted by the exhaust grooves when the grounding nickel plate is welded to the BMS rigid plate.

In an alternative embodiment, the BMS case is made of metal.

In this optional implementation, because the BMS box adopts metal to make, consequently, the BMS box can reduce the electromagnetic interference that BMS components and parts produced to have better electromagnetic compatibility.

In an alternative embodiment, the BMS case is covered with an insulating layer except for the limit ground rib.

In this optional embodiment, since the portions of the BMS case other than the limiting ground ribs are covered with the insulating layer, abnormal current generated when the BMS device is abnormal can be prevented from being conducted outside through the BMS case by the insulating layer. Simultaneously, because spacing ground connection rib does not cover has the insulating layer, consequently, spacing ground connection rib can normally and ground connection nickel piece electric connection to guarantee that the BMS hardboard can with BMS box and battery package box equipotential ground.

In an alternative embodiment, the battery pack further includes a connector mounted on the BMS rigid board.

In this alternative embodiment, since the battery pack further includes a connector, and the connector is mounted on the BMS board, it is possible to electrically connect with an external device through the connector.

In a second aspect, the present application provides an electric vehicle comprising a battery pack as set forth in any one of the preceding embodiments.

Compared with the prior art, the electric vehicle has the advantages of simple BM installation, high heat dissipation efficiency of the BMS and high balancing efficiency of the BMS.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic view of a partial structure of a battery pack disclosed in an embodiment of the present application;

fig. 2 is a schematic view of a partial structure of another battery pack disclosed in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a rear beam according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an edge beam according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a water-cooled plate disclosed in an embodiment of the present application;

fig. 6 is a schematic structural view of a BMS casing disclosed in an embodiment of the present application;

fig. 7 is a schematic diagram illustrating a BMS hardboard and a grounding nickel tab according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a grounding nickel plate 4 disclosed in the embodiments of the present application;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a cross-sectional view taken at I of FIG. 9;

fig. 11 is a sectional view at H in fig. 9;

FIG. 12 is a top view of FIG. 2;

FIG. 13 is a cross-sectional view at F in FIG. 12;

fig. 14 is an enlarged schematic view at E in fig. 13.

Icon: 1-BMS box; 101-side of the box body; 102-spacing grounding ribs; 103-a limiting groove; 2-water cooling plate; 201-water outlet; 202-a water outlet pipe; 203-water inlet; 204-water inlet pipe; 205-water channel; 206-weld notch; 301-left side beam; 3011-a second welded mating face; 302-right side beam; 303-rear beam; 3031-a first welded mating surface; 304-a front beam; 4-a grounding nickel sheet; 401-a weld; 402-an exhaust slot; 403-elastic deformation; 404-a steering angle; 5-BMS hard board; 6-connector.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a schematic view of a partial structure of a battery pack disclosed in an embodiment of the present application. As shown in fig. 1, the battery package of this application embodiment includes BMS components and parts (the attached drawing does not show), BMS box 1, water-cooling board 2, BMS hardboard 5 and battery package box, and water-cooling board 2 and battery package box are connected, and BMS box 1 welds with water-cooling board 2, and BMS hardboard 5 is connected with BMS box 1, and BMS components and parts are installed on BMS hardboard 5, and the box space intussuseption of BMS box 1 is filled with the heat-conducting glue, wherein, the heat-conducting glue contacts with BMS box 1, BMS components and parts, BMS hardboard 5.

In this application embodiment, because water cooling board 2 and battery package box body coupling, BMS box 1 and the welding of water cooling board 2, so just can be under the prerequisite that does not use BMS support and fixing bolt, fix BMS box 1 on the battery package box.

On the other hand, because BMS box 1 and the welding of water-cooling plate 2, BMS hardboard 5 is connected with BMS box 1, BMS components and parts are installed on BMS hardboard 5, and the box space intussuseption of BMS box 1 is filled with heat-conducting glue, heat-conducting glue and BMS box 1, BMS components and parts, 5 contacts of BMS hardboard, therefore, BMS components and parts just can transmit BMS box 1 through heat-conducting glue at during operation produced heat, and then transmit to water-cooling plate 2 through BMS box 1, and then take away the BMS components and parts through water-cooling plate 2 and at the produced heat of during operation, finally improve the radiating efficiency of BMS, and overcome this technical problem of the balanced inefficiency of BMS that the radiating efficiency of BMS components and parts leads to.

Compared with the prior art, the battery pack of this application embodiment has the installation simply, the high and high balanced efficient advantage of BMS's radiating efficiency, wherein, it is required to explain, BMS balanced efficiency is subject to BMS's radiating efficiency, specifically, if BMS's radiating efficiency is low, then BMS's cooling is slow, and then continuously be in the high temperature state in the preset time, at this moment, because BMS is in the high temperature state, BMS's balanced time and balanced electric current receive the restriction (if for avoiding further improving BMS's temperature, BMS's balanced time and balanced electric current can only be littleer), final BMS balanced efficiency is low, on the contrary, this application embodiment is through improving BMS's radiating efficiency, can improve BMS's cooling rate, make BMS's balanced time and balanced electric current bigger, finally improve BMS balanced efficiency.

It should be noted that BMS (BATTERY MANAGEMENT SYSTEM) refers to a BATTERY management system, wherein the BATTERY management system can be used for performing equalization processing on a plurality of BATTERY modules in a BATTERY pack. Further, the BMS component refers to an electronic component constituting the battery management system, and for example, the BMS component may be an electronic component such as an equalization resistor and a temperature sensor for equalization.

In the embodiment of the present application, the heat conduction glue of the embodiment of the present application may be a polyurethane heat conduction structural glue.

In the embodiment of the present application, please refer to fig. 2, and fig. 2 is a schematic partial structure diagram of another battery pack disclosed in the embodiment of the present application. As shown in fig. 2, the battery pack according to the embodiment of the present invention further includes a rear beam 303, a front beam 304, a left beam 301, and a right beam 302, wherein the rear beam 303 and the front beam 304 are both fixedly connected to the left beam 301 and the right beam 302, so that the rear beam 303 and the front beam 304, the left beam 301 and the right beam 302 form a battery pack case. The battery pack case further includes a bottom plate.

In the embodiment of the present application, as shown in fig. 2, the water-cooled plate 2 is fixedly connected to the bottom plate of the battery pack case, wherein in some embodiments, the water-cooled plate 2 directly serves as the bottom plate of the battery pack case and is welded to the rear beam 303, the front beam 304, the left beam 301 and the right beam 302. Specifically, please refer to fig. 3, wherein fig. 3 is a schematic structural diagram of a back beam according to an embodiment of the present disclosure. As shown in fig. 3, the back beam 303 is provided with a first welded mating surface 3031, wherein the back beam 303 is welded to the water cooled panel 2 through the first welded mating surface 3031. On the other hand, referring to fig. 4, fig. 4 is a schematic structural diagram of an edge beam disclosed in the embodiment of the present application, and it should be noted that the edge beam shown in fig. 4 may refer to a left edge beam or a right edge beam. As shown in fig. 4, the side beam is provided with a second welding fitting surface 3011, wherein the left side beam 301 and the right side beam 302 are welded to the water-cooled plate 2 through the second welding fitting surface 3011. It should be noted that the front beam 304 is provided with a third welding matching surface, and the front beam 304 is welded with the water-cooled plate 2 through the third welding matching surface.

In the embodiment of the present application, as shown in fig. 2, the water cooling plate 2 includes a water outlet 201, a water outlet pipe 202, a water inlet 203 and a water inlet pipe 204, wherein the water cooling liquid flows into the water inlet pipe 204 from the water inlet 203, flows into the water outlet pipe 202 communicated with the water inlet pipe 204 through the water inlet pipe 204, and flows out from the water outlet 201, so as to form a water circulation loop, and finally absorbs heat emitted from the BMS component through the circulation flow of the water cooling liquid in the water circulation loop.

In the embodiment of the present application, referring to fig. 5, fig. 5 is a schematic structural diagram of a water cooling plate disclosed in the embodiment of the present application. As shown in fig. 5, the water-cooled plate 2 further includes a water channel 205, wherein the water channel 205 is communicated with the water outlet pipe 202 and the water inlet pipe 204, and the water channel 205 forms a water circulation loop.

In the embodiment of the present application, as shown in fig. 5, a welding notch 206 is formed on the upper surface of the water-cooling plate 2, and the water-cooling plate 2 is welded to the BMS case 1 through the welding notch. In the present alternative embodiment, the bms casing 1 can be welded to the water-cooled plate 2 by the welding notches 206 formed at the upper surface of the water-cooled plate 2.

In the embodiment of the present application, referring to fig. 6, fig. 6 is a schematic structural view of a BMS box disclosed in the embodiment of the present application. As shown in fig. 6, the BMS case 1 includes a case side 101 and limiting grounding ribs 102, the limiting grounding ribs 102 are fixed at the left and right ends of the BMS case 1 and are fixedly connected to the case side 101, wherein adjacent limiting grounding ribs form limiting grooves 103, and the left and right ends of the BMS hard board 5 are engaged with the limiting grooves 103. In this alternative embodiment, since the spacing ground ribs 102 are fixed to the left and right ends of the BMS case 1, wherein the adjacent spacing ground ribs form the spacing grooves 103, the left and right ends of the BMS rigid board 5 can be engaged with the spacing grooves 103.

In the embodiment of the present application, optionally, the battery pack further includes a grounding nickel tab 4, wherein, referring to fig. 7, fig. 7 is a schematic diagram illustrating a connection between a BMS hardboard and the grounding nickel tab disclosed in the embodiment of the present application. As shown in fig. 7, the ground nickel plates 4 are fixed to the left and right ends of the BMS rigid board 5.

Further, please refer to fig. 8, 9, 10, and 11, in which fig. 8 is a schematic structural diagram of a grounding nickel plate 4 disclosed in an embodiment of the present application, fig. 9 is a top view of fig. 8, fig. 10 is a cross-sectional view at I in fig. 9, and fig. 11 is a cross-sectional view at H in fig. 9. As shown in fig. 8, 9, 10 and 11, the grounding nickel plate 4 according to the embodiment of the present application includes a welding part 401 and an elastic deformation part 403, wherein the welding part 401 is connected to the BMS hard sheet 5, and both left and right ends of the elastic deformation part 403 are connected to the welding part 401. In this alternative embodiment, the BMS hard board 5 can be equipotentially grounded to the BMS case 1 and the battery pack case through the grounding nickel tabs 4, wherein the grounding nickel tabs 4 can be connected to the BMS hard board 5 through the welding portions 401, and the BMS hard board 5 can be conveniently connected to the stopper grooves 103 through the elastic deformation portions 403 connected to the welding portions 401 without connecting the BMS hard board 5 to the BMS case 1 through bolts.

In the embodiment of the present application, please refer to fig. 12, fig. 13 and fig. 14 specifically, wherein fig. 12 is a top view of fig. 2, fig. 13 is a cross-sectional view at F in fig. 12, and fig. 14 is an enlarged schematic view at E in fig. 13. As shown in fig. 12, 13 and 14, the elastic deformation part 403 according to the embodiment of the present invention is pressed and deformed when inserted into the position-limiting groove 103, and further generates an elastic force, which causes the elastic deformation part 403 to abut against the position-limiting grounding rib 102, thereby realizing the engagement between the BMS hard plate 5 and the position-limiting groove 103.

In the embodiment of the present application, optionally, as shown in fig. 11, guide corners 404 are provided at both left and right ends of the elastic deformation portion 403. In this alternative embodiment, since the left and right ends of the elastic deformation part 403 are provided with the guide corners 404, the left and right ends of the elastic deformation part 403 can be easily inserted into the stopper grooves 103 at the left and right ends of the BMS housing 1 by the guide corners 404.

In the embodiment of the present application, optionally, as shown in fig. 8 and 10, the grounding nickel plate 4 is further provided with an air exhaust groove 402. In this alternative embodiment, since the grounding nickel plate 4 is further provided with the exhaust grooves 402, when the grounding nickel plate 4 is soldered to the BMS hard plate 5, gas generated by the soldering can be exhausted by the exhaust grooves 402.

In the embodiment of the present application, the BMS case 1 is optionally made of metal. In this optional embodiment, because BMS box 1 adopts metal to make, consequently, BMS box 1 can reduce the electromagnetic interference that BMS components and parts produced to have better electromagnetic compatibility.

In this application embodiment, specifically, because BMS box 1 adopts metal to make, therefore BMS box 1 can form a metal shield, and then utilizes the metal shield to reduce the electromagnetic interference that BMS components and parts produced.

In the embodiment of the present application, the BMS case 1 may be alternatively made of die cast aluminum or extruded aluminum. It should be noted that the BMS case 1 may be made of other metals such as copper.

In an alternative embodiment, the portions of the BMS case 1 other than the stopper ground ribs 102 are covered with an insulating layer, wherein the insulating layer may be an insulating paint such as an insulating varnish. In this alternative embodiment, since the portions of the BMS case 1 other than the limit grounding ribs 102 are covered with the insulating layer, it is possible to prevent abnormal current generated when the BMS component is abnormal from being conducted outside through the BMS case 1 by the insulating layer. Meanwhile, since the limiting grounding rib 102 is not covered with the insulating layer, the limiting grounding rib 102 can be normally electrically connected with the grounding nickel plate 4, thereby ensuring that the BMS hard board 5 can be equipotentially grounded with the BMS box 1 and the battery pack box.

In the embodiment of the present application, as shown in fig. 7, optionally, the battery pack of the embodiment of the present application further includes a connector 6, and the connector 6 is mounted on the BMS rigid board 5. In this alternative embodiment, since the battery pack further includes the connector 6, and the connector 6 is mounted on the BMS board 5, it is possible to electrically connect with an external device through the connector 6.

In addition, the embodiment of the application also provides an electric vehicle, and the electric vehicle comprises the battery pack according to any one of the previous embodiments. Compared with the prior art, the electric vehicle of this application embodiment has the advantage that the BM installation is simple, BMS's radiating efficiency is high and BMS is balanced efficient.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a battery pack, its characterized in that, battery pack includes BMS components and parts, BMS box, water-cooling board, BMS hardboard, battery pack box, water-cooling board and battery pack box body coupling, the BMS box with the welding of water-cooling board, the BMS hardboard with the BMS box body coupling, the BMS components and parts install in on the BMS hardboard, the box space intussuseption of BMS box is filled with the heat-conducting glue, wherein, the heat-conducting glue with the BMS box BMS components and parts, BMS hardboard contact.

2. The battery pack according to claim 1, wherein the water cooling plate has a welding notch formed on an upper surface thereof, and the water cooling plate is welded to the BMS case through the welding notch.

3. The battery pack according to claim 1, wherein the BMS case includes stopper grounding ribs fixed to left and right ends of the BMS case, wherein adjacent stopper grounding ribs form stopper grooves, and left and right ends of the BMS rigid board are engaged with the stopper grooves.

4. The battery pack according to claim 3, further comprising grounding nickel plates fixed to left and right ends of the BMS hard board;

the grounding nickel plate comprises a welding part and an elastic deformation part, wherein the welding part is connected with the BMS hard board, and the left end and the right end of the elastic deformation part are connected with the welding part.

5. The battery pack according to claim 4, wherein guide angles are provided at both left and right ends of the elastically deformable portion.

6. The battery pack of claim 4, wherein the grounding nickel plate is further provided with a vent groove.

7. The battery pack according to claim 2, wherein the BMS case is made of metal.

8. The battery pack according to claim 7, wherein a portion of the BMS case other than the stopper grounding rib is covered with an insulating layer.

9. The battery pack according to claim 1, further comprising a connector mounted on the BMS rigid board.

10. An electric vehicle comprising the battery pack according to any one of claims 1 to 9.

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