CN217672123U - Battery pack lower box body, battery pack and vehicle - Google Patents

Abstract

The embodiment of the application provides box, battery package and vehicle under battery package, wherein, the box includes under the battery package: a lower case body; a bottom guard plate disposed on the bottom of the lower case body to protect the bottom of the lower case body; and the pressure sensor is arranged on the bottom protection plate. The technical scheme that this application embodiment provided, bottom through box body under sets up pressure sensor, on current bottom safeguard function's basis, for car bottom safety provides quantifiable pressure detection function, when running into the bottom and wipe and bump, during operating mode such as impact, pressure sensor possesses the function of monitoring and feedback to plus load, can monitor and judge the damage, thereby supplementary driver makes reasonable judgement to the scheme of handling of vehicle and battery package, the security that the improvement car should bottom safety operating mode.

Description

Battery pack lower box body, battery pack and vehicle

Technical Field

The embodiment of the application relates to the technical field of vehicles, in particular to a battery pack lower box body, a battery pack and a vehicle.

Background

The battery of its bottom of electric automobile or oil-electricity hybrid vehicle on the current market is when running into bottom and rubbing and bumping, impact etc. under operating mode, can't help the driver in time to discern whether the battery is still in healthy state, or judges whether the vehicle can also the safe operation. When the battery is damaged due to external load and certain safety risk is generated, if a driver judges that an error occurs, the vehicle is not overhauled or stopped, serious consequences can be caused, and accidents that the battery is delayed to spontaneously combust and ignite can occur under extreme conditions, so that unpredictable personnel and property losses are caused.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application have been made to provide a battery pack lower case, a battery pack, and a vehicle that solve or at least partially solve the above problems.

The embodiment of the application provides box under battery package, includes:

a lower case body; and the number of the first and second groups,

a bottom guard plate disposed on the bottom of the lower case body to protect the bottom of the lower case body;

and the pressure sensor is arranged on the bottom protection plate.

Optionally, the backplate comprises a backplate upper plate and a backplate lower plate, and the pressure sensor is arranged between the backplate upper plate and the backplate lower plate.

Optionally, the pressure sensor is bonded with the bottom guard plate upper plate; and/or the pressure sensor is bonded with the lower plate of the bottom protection plate.

Optionally, the pressure sensor is bonded to the bottom guard plate upper plate and the bottom guard plate lower plate through glue layers, and the pressure sensor is wrapped in the glue layers.

Optionally, a mounting area is formed in the lower box body, and the mounting area is used for mounting the power supply core module; the pressure sensor corresponds to the mounting area.

Optionally, a plurality of mounting areas are formed in the lower box body, and each mounting area is used for accommodating one battery cell module; and one pressure sensor is correspondingly arranged below each mounting area.

Optionally, the mounting area is square, and the pressure sensor is correspondingly square.

Optionally, the bottom guard plate is provided with an electrical interface, and the electrical interface is electrically connected to the pressure sensor.

The embodiment of the application further provides a battery pack, which comprises a battery cell module and a battery pack lower box body, wherein the battery cell module is installed in the lower box body of the battery pack lower box body.

The embodiment of the application also provides a vehicle which comprises the battery pack.

The technical scheme that this application embodiment provided, bottom through box body under sets up pressure sensor, on current bottom safeguard function's basis, for car bottom safety provides quantifiable pressure detection function, when running into the bottom and wipe and bump, during operating mode such as impact, pressure sensor possesses the function of monitoring and feedback to plus load, can monitor and judge the damage, thereby supplementary driver makes reasonable judgement to the scheme of handling of vehicle and battery package, the security that the improvement car should bottom safety operating mode.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of a lower case of a battery pack according to an embodiment of the present disclosure;

fig. 2 is an assembly view of the lower case of the battery pack of fig. 1.

Reference numerals:

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, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.

It should be noted that, in the description of the present application, if the terms "first", "second", etc. appear, the terms "first", "second", etc. are only used for convenience in describing different components or names, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" is presented throughout, it is meant to include three juxtapositions, exemplified by "A and/or B," including either scheme A, or scheme B, or schemes in which both A and B are satisfied.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Batteries at the bottom of an electric automobile or a gasoline-electric hybrid automobile on the current market cannot help a driver to identify whether the batteries are still in a healthy state or not in time or judge whether the automobile can run safely or not when the batteries meet working conditions of bottom rubbing, impact and the like. When the battery is damaged due to external load and certain safety risk is generated, if a driver judges that an error occurs, the vehicle is not overhauled or stopped, serious consequences can be caused, and accidents that the battery is delayed to spontaneously combust and ignite can occur under extreme conditions, so that unpredictable personnel and property losses are caused.

To above-mentioned problem, this application embodiment provides box under battery package, can improve the security that electric automobile and oil-electricity hybrid vehicle reply bottom safety operating mode.

Referring to fig. 1 and fig. 2 in combination, an embodiment of the present application provides a lower case of a battery pack, including: a lower box body 30, a bottom guard plate 10 and a pressure sensor 20.

A mounting area 33 is formed in the lower case body 30, and the mounting area 33 is used for mounting a cell module (not shown). Specifically, the lower case body 30 has a bottom plate 31 and a side frame 32, and the bottom plate 31 and the side frame 32 enclose a mounting area 33 for accommodating the cell module. The bottom guard plate 10 is disposed at the bottom of the lower case body 30, and specifically, the bottom guard plate 10 is disposed at the bottom of the bottom plate 31 and fixed with the lower case body 30. The pressure sensor 20 is fixed to the backplate 10.

Set up at least one electric core module in box body 30 down, each electric core module can include a plurality of electric cores. In some embodiments of this application, set up a plurality of electric core modules in box body 30 down, a plurality of electric core modules are the rectangular array form and arrange to the horizontal direction is the example, and a plurality of electric core modules are the rectangular array form and arrange on the horizontal direction to bottom plate 31 through box body 30 supports down. For easy to assemble, form a plurality of installation areas 33 in the lower box body 30, all set up a battery core module in each installation area 33. Further, lower box body 30 can also have crossbeam and longeron, and crossbeam and longeron are crisscross to connect the side frame 32 of box body 30 down respectively, in order to separate the inside space of lower box body 30 and establish to a plurality of installation region 33, all correspond in each installation region 33 and set up an electric core module. The battery cell module is limited jointly through the bottom plate 31, the cross beam, the longitudinal beam and the side frame 32, and the battery cell module is prevented from moving in the lower box body 30. In a specific embodiment of the present application, the lower box body 30 has a cross beam and four longitudinal beams, the cross beam is disposed at the middle of the longitudinal beams, ten installation regions 33 with the same size are separated from the inner space of the lower box body 30, and each installation region 33 is used for accommodating one battery cell module.

Further, the lower box body 30 may further have a top cover (not shown), the top cover is disposed on the top surface of the side frame 32 of the lower box body 30, and the plurality of mounting areas 33 are hermetically covered, so that the battery cell module is sealed in the lower box body 30, and the battery cell module is prevented from being soaked in water.

Further, a liquid cooling plate can be further arranged in the lower box body 30 to cool the battery cell module, so that heat dissipation of the battery cell is realized. A liquid channel is formed in the liquid cooling plate and provided with a liquid inlet and a liquid outlet, and cooling liquid enters the liquid channel from the liquid inlet and finally flows out of the liquid outlet after being subjected to heat exchange with the battery core. After the liquid cooling plate is arranged, part of heat of the battery cell can be taken away by circulating cooling liquid, and the heat dissipation problem that the battery cell is large in heat productivity and heat is concentrated is solved. Wherein, the liquid cooling plate can set up the side at electric core module, and perhaps, the liquid cooling plate also can set up between two adjacent electric cores. For making the cooling effect better, can also set up the heat conduction between liquid cold plate and the electric core and glue, fill up the clearance between liquid cold plate and the electric core through the heat conduction to make the liquid cold plate glue through the heat conduction and laminate with electric core, provide the radiating efficiency.

Due to pure electric vehicles or hybrid electric vehicles, the power battery, i.e., the battery pack, is generally disposed at the bottom of the vehicle body. And the automobile needs to face various road conditions in the driving process, so that the risks of supporting the bottom of the automobile and hitting flying stones exist. Therefore, when the battery pack is arranged at the bottom of the vehicle body, the bottom of the battery pack is easily impacted by an external object, and when the bottom of the battery pack is subjected to a large load, the battery cell in the battery pack can be damaged, so that the safety of the battery is seriously affected. Therefore, in the embodiment of the application, the bottom protection plate 10 is additionally arranged at the bottom of the lower box body of the battery pack, so that the bottom of the battery pack is protected, and the battery pack is prevented from being impacted too much. Alternatively, the floor sheathing 10 covers the entire lower surface of the lower case body 30. In an alternative embodiment, the side edge of the bottom guard plate 10 is flush with the side edge of the lower box body 30, that is, the area of the cross section of the bottom guard plate 10 is the same as the area of the lower surface of the lower box body 30, which can not only achieve complete coverage of the entire lower surface of the lower box body 30, but also avoid the problem of large material cost caused by the oversize of the bottom guard plate 10.

In the embodiment of the application, bottom through box body 30 under sets up pressure sensor 20, on current bottom safeguard function's basis, for car bottom safety provides quantifiable pressure detection function, when running into the bottom and wipe and bump, when working conditions such as impact, pressure sensor 20 possesses the function of monitoring and feedback to the load of plus, can monitor and judge the damage, thereby supplementary driver makes reasonable judgement to the vehicle and the processing scheme of box body 30 down, the security that the improvement car should bottom safety operating mode.

The following examples are presented to further illustrate the present application in conjunction with the detailed description.

In the embodiment of the present application, the apron plate 10 includes an apron plate upper plate 11 and an apron plate lower plate 12, and the pressure sensor 20 is disposed between the apron plate upper plate 11 and the apron plate lower plate 12. Therefore, the bottom guard plate 10 and the pressure sensor 20 form a sandwich structure, and the pressure sensor 20 is covered by the bottom guard plate upper plate 11 and the bottom guard plate lower plate 12 together, so that the pressure sensor 20 can be prevented from being exposed outside and colliding with other objects to be damaged.

Further, in some embodiments of the present application, a first groove may be formed on the lower surface of the bottom guard plate upper plate 11, the pressure sensor 20 is accommodated in the first groove, and the bottom guard plate lower plate 12 covers the first groove, so that the bottom guard plate upper plate 11 and the bottom guard plate lower plate 12 are completely attached to each other, and a gap between the two is avoided. In addition, a glue layer 13 can be arranged between the bottom guard plate upper plate 11 and the bottom guard plate lower plate 12 for bonding, and the glue layer 13 is arranged around the first groove, so that the first groove is completely sealed, and the pressure sensor 20 is prevented from contacting liquid. Or, in some embodiments of the present application, a second groove is formed on the upper surface of the lower bottom plate 12, the pressure sensor 20 is accommodated in the second groove, and the upper bottom plate 11 covers the second groove, so that the upper bottom plate 11 and the lower bottom plate 12 are completely attached to each other, and a gap between the two is avoided. Similarly, a glue layer 13 may be disposed between the backplate upper plate 11 and the backplate lower plate 12 for bonding, the glue layer 13 being disposed around the second recess so that the second recess is completely sealed and the pressure sensor 20 is protected from liquid. Alternatively, in some embodiments of the present application, the bottom guard plate upper plate 11 is provided with a first groove, the bottom guard plate lower plate 12 is provided with a second groove, the first groove and the second groove correspond to each other and together form a receiving cavity, and the pressure sensor 20 is disposed in the receiving cavity. Of course, in other embodiments of the present application, the bottom protection plate 10 may also be a unitary plate, and the pressure sensor 20 is disposed between the bottom protection plate 10 and the bottom plate 31 of the lower box body 30.

Further, the pressure sensor 20 is adhered to the bottom guard plate upper plate 11; and/or, the pressure sensor 20 is bonded to the lower backplate plate 12. And the assembly is safe and reliable by adopting a bonding mode. When the pressure sensor 20 is bonded to the bottom guard plate upper plate 11 and the bottom guard plate lower plate 12, the adhesive layer 13 for bonding can entirely wrap the pressure sensor 20, that is, the pressure sensor 20 is wrapped in the adhesive layer 13. In addition, the glue layer 13 can fill up the gap between the bottom guard plate upper plate 11 and the bottom guard plate lower plate 12, so that the pressure sensor 20 has good sealing performance, is not polluted by external media, and can prolong the service life of the pressure sensor 20. The bonding mode can guarantee that sandwich structure possesses higher bonding strength, improves the performance of bottom protection. The adhesive layer 13 includes, but is not limited to, AB adhesive, UV adhesive, epoxy adhesive, and the like.

In the embodiment of the present application, the pressure sensor 20 is a flexible film pressure sensor 20. The flexible film pressure sensor 20 is a novel pressure sensor 20 prepared by a nano process based on novel materials, and has the advantages of good flexibility, free bending, small thickness, high sensitivity and the like. This flexible film pressure sensor 20 is thinner, and the thickness that occupies is less, can avoid appearing great gap between backplate upper plate 11 and the backplate hypoplastron 12 down at the end, and simultaneously, flexible film pressure sensor 20 is higher with the laminating degree between backplate upper plate 11 and the backplate hypoplastron 12 down at the end, is favorable to the sealed of flexible film pressure sensor 20 self. Moreover, the flexible film pressure sensor 20 can also quickly recover the elastic deformation of the sensor, and has a quick response capability.

In the embodiment of the present application, the pressure sensor 20 is disposed corresponding to the mounting area 33. The correspondence here means that the pressure sensor 20 and the mounting region 33 at least partially overlap in the up-down direction. Alternatively, when a plurality of mounting regions 33 are provided, one pressure sensor 20 is provided below each of the mounting regions 33. Through corresponding each electric core module all set up a pressure sensor 20, can implement solitary control to the electric core module of difference, the degree of accuracy is higher. In other embodiments of the present application, each pressure sensor 20 may correspond to a plurality of battery cell modules, and may monitor the impact received by the plurality of battery cell modules simultaneously.

The shape of the pressure sensor 20 may be adapted to the shape of the mounting area 33, i.e. both shapes are substantially the same, for example, the mounting area 33 is square and the pressure sensor 20 is correspondingly square. Alternatively, in other embodiments, the mounting area 33 is circular and the pressure sensor 20 is correspondingly circular. Further, the pressure sensor 20 may be divided into sizes adapted to different areas (referred to as mounting areas 33), which correspond to the cell modules one to one, and the measuring range thereof may be selected according to different external load conditions, and may cover a load range of 10N to 100000N. The size of the pressure sensor 20 may also coincide or substantially closely coincide with the size of the mounting area 33, i.e. the outer edge of the pressure sensor 20 is level in the up-down direction with the inner edge of the mounting area 33 (the mounting area 33 is in a cavity structure, thus its inner edge refers to the edge of the inner cavity wall of the cavity). Alternatively, the size of the pressure sensor 20 may be slightly larger or smaller than the size of the mounting area 33. Through the shape adaptation setting with pressure sensor 20's shape and installation area 33, can guarantee that pressure sensor 20 can comparatively accurately monitor the situation in each position of electric core module to avoid pressure sensor 20 to set up too big extravagant or set up the emergence that the undersize leads to the unable accurate monitoring of electric core module condition.

Further, the bottom guard plate 10 is provided with an electrical interface 14, and the electrical interface 14 is electrically connected with the pressure sensor 20. This electrical interface 14 is low pressure communication socket, and electrical interface 14 is as communication interface and power source, and accessible signal line is connected with whole car control system, still can provide the power for pressure sensor 20 simultaneously to pass through FPC (circuit board) circuit transmission pressure acquisition signal. In the embodiment of the present application, the electrical interface 14 is disposed on the side of the backplate 10.

In order to facilitate the assembly and disassembly of the bottom guard plate 10 and the lower box body 30, in some embodiments of the present application, the bottom guard plate 10 is detachably connected to the lower box body 30. Through the detachable connection of the bottom protection plate 10 and the lower box body 30, the bottom protection plate 10 can be detached or replaced for a plurality of times in an after-sale stage, and the normal work of the pressure sensor 20 is ensured. The bottom guard plate 10 and the lower box body 30 can be detachably connected in various manners, and one manner in which the bottom guard plate 10 and the lower box body 30 can be detachably connected is that the bottom guard plate 10 and the lower box body 30 are connected by bolts 40. Specifically, first through-hole is seted up to end backplate upper plate 11, first through-hole runs through the upper and lower surface of end backplate upper plate 11 along upper and lower direction, end backplate hypoplastron 12 sets up the second through-hole, the second through-hole runs through the upper and lower surface of end backplate hypoplastron 12 along upper and lower direction, the bottom plate 31 of lower box body 30 sets up the third through-hole, this third through-hole can be the blind hole, and set up in the lower surface of bottom plate 31, and do not run through the upper surface of bottom plate 31, consequently can avoid leading to the production of the sealed not tight condition of lower box body 30 because the junction of end backplate 10 and lower box body 30. The bolt 40 passes through the first and second through holes in this order and is connected to the third through hole, thereby connecting the apron lower plate 12, the apron upper plate 11, and the lower case body 30 together. Meanwhile, the pressure sensor 20 is avoided by arranging the first through hole and the second through hole, so that the pressure sensor 20 is prevented from being damaged.

Another way to achieve the detachable connection of the bottom guard plate 10 and the lower box body 30 is that the bottom guard plate 10 and the lower box body 30 are connected by bolts 40, and the bottom guard plate 10 and the lower box body 30 are further clamped by a buckle. Through the buckle joint, can be with backplate 10 and lower box body 30 preinstallation at the bottom, play predetermined position effect, make things convenient for follow-up bolt 40 to connect.

The bottom guard plate 10 is any one of an aluminum alloy plate, a steel plate, and a plastic plate. The bottom guard plate upper plate 11 and the bottom guard plate lower plate 12 can be made of metal materials such as aluminum alloy and steel plate, or non-metal materials with certain protective performance, such as plastics, including but not limited to various thermosetting or thermoplastic engineering plastics or various fiber reinforced materials using polymer materials as matrix.

The shape of lower box body 30 includes but not limited to rectangle, square, circular etc. and following box body 30 is rectangle as an example, and correspondingly, end backplate 10 is square, and both shapes match, so end backplate 10 when playing the guard action to the bottom of lower box body 30, can also make the area of end backplate 10 set up minimum, realizes saving of panel.

Further, the inside of lower box body 30 also can set up other pressure sensor, and pressure sensor can set up the upper surface at bottom plate 31, and the pressure sensor of this department detects electric core's pressure itself, when electric core leads to pressure to rise owing to generating heat, through the inside pressure sensor who sets up of lower box body 30, can in time monitor the change of pressure to in time early warning through control system, thereby improve the safety in utilization of electric core.

The embodiment of the application further provides a battery pack, the battery pack comprises a lower battery pack box body and a battery core module, and the battery core module is installed in the lower box body 30 of the lower battery pack box body. For a specific structure of the lower case of the battery pack, please refer to the above embodiments, which are not described herein again.

The embodiment of the application also provides a vehicle, and the vehicle includes automobile body and battery package, and the battery package sets up in the bottom of automobile body, provides power for the vehicle. For the specific structure of the battery pack, please refer to the above embodiments, which are not described herein again. The vehicle can be a pure electric vehicle or a hybrid vehicle.

In the embodiment of the application, set up the battery package in automobile body bottom, backplate 10 at the bottom of additionally increasing through the lower surface of box body under, the protection of realization box body bottom under to avoids the box body to receive too big striking and harm electric core down. Simultaneously, through setting up pressure sensor 20 at backplate 10, on current bottom safeguard function's basis, provide quantifiable pressure detection function for car bottom safety, when meetting bottom and rub and bump, when working conditions such as impact, pressure sensor 20 possesses the function of monitoring and feedback to plus load, pressure sensor 20 sends monitoring data to battery management system in real time, battery management system carries out real-time analysis to the data that pressure sensor 20 monitored, judge each electric core module state, the location receives the too big electric core module that is pressure abnormal state of pressure, can monitor and judge whether the electric core module damages, thereby supplementary driver makes reasonable judgement to the scheme of handling of vehicle and battery package, improve the security that the car should be to bottom safety operating mode. Simultaneously, when judging that the electricity core module receives pressure anomaly, the battery management system of car can also control the alarm of car and report to the police, has improved the security that the electricity core module used on the car.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. The utility model provides a box under battery package which characterized in that includes:

a lower case body;

a bottom guard plate disposed on the bottom of the lower case body to protect the bottom of the lower case body; and (c) a second step of,

and the pressure sensor is arranged on the bottom protection plate.

2. The battery pack lower case of claim 1, wherein the backplate comprises a backplate upper plate and a backplate lower plate, and the pressure sensor is disposed between the backplate upper plate and the backplate lower plate.

3. The battery pack lower case according to claim 2, wherein the pressure sensor is bonded to the bottom guard plate upper plate; and/or the pressure sensor is bonded with the lower plate of the bottom protection plate.

4. The battery pack lower case of claim 3, wherein the pressure sensor is bonded to the backplate upper plate and the backplate lower plate through a glue layer, and the pressure sensor is wrapped in the glue layer.

5. The battery pack lower case according to any one of claims 1 to 4, wherein a mounting region is formed in the lower case body, and the mounting region is used for mounting the power supply core mold group; the pressure sensor corresponds to the mounting area.

6. The battery pack lower case body according to claim 5, wherein a plurality of mounting areas are formed in the lower case body, and each mounting area is used for accommodating one battery cell module; and one pressure sensor is correspondingly arranged below each mounting area.

7. The battery pack lower case of claim 5, wherein the mounting area is square and the pressure sensor is correspondingly square.

8. The battery pack lower box body of claim 1, wherein the bottom protection plate is provided with an electrical interface, and the electrical interface is electrically connected with the pressure sensor.

9. A battery pack, characterized by comprising a cell module and the battery pack lower case body according to any one of claims 1 to 8, wherein the cell module is installed in the lower case body of the battery pack lower case body.

10. A vehicle characterized by comprising the battery pack according to claim 9.

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