CN218333988U - Bottom protection plate structure, battery pack and electric equipment - Google Patents

Abstract

The application provides a bottom protection plate structure, a battery pack and electric equipment, and relates to the technical field of power batteries. The bottom protection plate structure is used for protecting the battery pack, the bottom protection plate structure is provided with a containing cavity, a liquid cooling loop is configured in the containing cavity, and the liquid cooling loop is provided with cooling liquid for conducting heat with the battery pack. The bottom protection plate structure is provided with the containing cavity with the liquid cooling loop, and the liquid cooling loop circulates to have coolant liquid, so that when the battery pack is arranged at the upper end of the bottom protection plate structure, the bottom protection plate structure can conduct heat to the battery pack while protecting the battery pack, the integration level can be improved, the assembly process is reduced, and the manual operation cost is reduced.

Description

Bottom protection plate structure, battery pack and electric equipment

Technical Field

The application relates to the technical field of power batteries, in particular to a bottom protection plate structure, a battery pack and electric equipment.

Background

The power battery package of new energy vehicle generally all arranges under the chassis of whole car, the power battery package large tracts of land exposes at whole car vehicle bottom, when the vehicle process of traveling presses the material such as stone or fragment of brick on the road surface, these material can splash or strike the bottom of battery package, at the vehicle in-process of going up a slope, battery package bottom is also scraped ground easily, or cross the deceleration strip on the road, when touchhing road tooth, also cause the damage to battery package bottom easily, in addition battery package bottom exposes outside for a long time, can receive acid, alkali strong corrosive environment damage, these damages all can influence the normal use function of battery package, take place safety accidents such as thermal runaway or the explosion of starting even.

In the related technology, a thicker reinforcing structure or a metal structure plate is usually arranged at the bottom of the battery pack, the integration level is lower in the mode, a matched liquid cooling plate system is needed for matching the heat management performance of the battery pack, a plurality of assembling procedures are increased, and the manual operation cost is also increased.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a bottom protection plate structure, battery package and consumer can improve the integrated level, reduces the assembly process, reduces the manual work cost.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, the present application provides a bottom protective plate structure, bottom protective plate structure is used for protecting the battery package, bottom protective plate structure has one and holds the chamber, it disposes the liquid cooling return circuit to hold the intracavity, the liquid cooling return circuit is provided with the coolant liquid, in order to be used for with the battery package carries out the heat conduction.

At the in-process of above-mentioned realization, end backplate structure is provided with the chamber that holds that has the liquid cooling return circuit, and liquid cooling return circuit circulation has the coolant liquid for when the battery package sets up in end backplate structure's upper end, end backplate structure also can carry out the heat conduction to the battery package when can protecting the battery package, can improve the integrated level, reduce the assembly process, reduced the manual operation cost.

In some embodiments, the bottom guard plate structure includes a first bottom guard plate and a second bottom guard plate, the first bottom guard plate and the second bottom guard plate are distributed along an up-down direction, and the first bottom guard plate and the second bottom guard plate are connected to form the accommodating cavity.

At the in-process of above-mentioned realization, backplate at the bottom of first and the second is connected, can carry out the heat conduction to the battery package in, because backplate at the bottom of first and the second does not need the spraying PVC glue film, and backplate all has corrosion resistance at the bottom of backplate at the bottom of first and the second, is favorable to subtracting heavy and reduction in production cost.

In some embodiments, the battery pack is disposed on a side of the first bottom guard plate away from the second bottom guard plate, and the liquid cooling loop is disposed on a side of the first bottom guard plate close to the second bottom guard plate.

At the in-process of above-mentioned realization, backplate at the bottom of the first is provided with the liquid cooling return circuit, can cross and carry out the heat conduction to the battery package, and backplate set up in the below in liquid cooling return circuit at the bottom of the second simultaneously can form the protection to the liquid cooling return circuit, and keeps apart the heat of road surface radiation effectively, ensures the safe in utilization of battery package.

In some embodiments, the thickness of the second bottom guard is not less than the thickness of the first bottom guard. The safety of the product can be improved, the liquid cooling loop is prevented from being punctured, and the safety performance of the battery pack is improved.

In some embodiments, the thickness of the second bottom guard plate is 0.8 to 3mm. When can play the protection, also can cooperate with first end backplate, realize the effect with battery package heat conduction.

In some embodiments, the structure of at least a portion of the second backplate is configured as a buffer zone located on a side of the second backplate remote from the first backplate.

In the process of realizing, the backplate is provided with buffer zone at the bottom of the second for when the backplate received the condition such as stone impact at the bottom of the second, buffer zone can cushion it well, avoids backplate to be punctured at the bottom of the second, realizes the protection to liquid cooling return circuit and battery package.

In some embodiments, the liquid cooling circuit is provided with a sensor for detecting the cooling liquid. Can detect the coolant liquid in the liquid cooling return circuit through setting up the sensor for when the liquid cooling return circuit is punctured and leads to the coolant liquid to reveal, the accessible sensor reports to the police, is convenient for take corresponding measure.

In a second aspect, the present application also provides a battery pack, including: a plurality of battery modules; a frame structure having a mounting cavity configured to receive the battery module; and a backplate structure according to any one of the preceding claims configured to be connected to the frame structure.

At the in-process of above-mentioned realization, the battery module holds in frame construction's installation cavity, and frame construction and end backplate structure are connected, can realize taking out you and still the fixed of module, also conveniently dismantles operation and subsequent after-sales maintenance.

In some embodiments, the frame structure includes a frame body and a support body, the support body is configured to be connected with an inner edge of the frame body to form the mounting cavities, and the support body is provided with a support portion configured to mount the battery module.

At the in-process of above-mentioned realization, the supporting main part is connected with the frame main part, and when the battery module set up in the installation cavity in time, the supporting part of supporting the main part can support the battery module, and backplate structure's load at the bottom of reducible, and then the backplate structure is at the deformation of reduction in the use, and the risk that backplate structure was punctured at the bottom of the reduction.

In a third aspect, the present application further provides an electric device, including the battery pack according to any one of the above aspects.

Because the electric device provided in the third aspect of the present application includes the battery pack in the technical solution of the second aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for 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 a user of ordinary skill in the art, other related drawings can be obtained according to the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a bottom protection plate structure and an electric device disclosed in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a frame structure of a battery pack disclosed in an embodiment of the present application.

Reference numerals

100. A bottom guard plate structure; 101. a first bottom guard plate; 102. a second bottom guard plate; 200. a frame structure; 201. a frame body; 202. a support body; 2021. a support portion.

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 embodiments of the present application, but 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.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a user of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the utility model is used to place conventionally, and are used only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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 further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically 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 to a user of ordinary skill in the art.

Examples

The power battery packs of common new energy vehicles are uniformly arranged under the chassis, and when the vehicles run and press hard substances such as stones or bricks on the road surface, the substances can splash or impact the bottoms of the battery packs; when the vehicle goes up a slope, passes through a deceleration strip and touches a road shoulder, the bottom of the battery pack is easy to knock the bottom to cause damage. In addition, the bottom of the battery pack is exposed for a long time and can be damaged by strong corrosive environments such as acid and alkali, and the damage can influence the normal use function of the battery pack and even cause safety accidents such as thermal runaway or fire explosion. At present, all protect at the bottom of installing the backplate additional to the battery package, this kind of traditional backplate scheme at the bottom possesses following advantage: the structure is simple, and the forming process is mature; (2) The bottom guard plate is convenient to assemble and disassemble, and is convenient for after-sale maintenance. The installation of the bottom guard plate is the current leading trend, has a certain effect on protecting the battery pack, and is very favorable for the development requirements of new energy automobiles in the long run.

However, the inventor finds in the design process that the conventional bottom guard plate scheme also has the following disadvantages: (1) heavy weight, high cost: the structure is usually formed by punching the metal plate, the material is steel, in order to avoid bad quality such as rusting caused by falling of the metal plate coating due to bottom collision and stone impact, the PVC glue layer is additionally sprayed besides galvanization and electrophoresis of the metal plate, so that the weight is increased, and the cost is invisibly increased; (2) low integration level: as shown in fig. 1, in order to match the thermal management performance of the battery pack, a matched liquid cooling plate system is needed, and a liquid cooling plate is arranged above a bottom protection plate, so that the integration level is low, a plurality of assembly processes are increased, and the manual operation cost is also increased. The battery pack is large in size, and if the problems cannot be solved, the development of new energy vehicles is not facilitated for a long time.

In view of this, as shown in fig. 1, in a first aspect, the present application provides a bottom cover structure 100, where the bottom cover structure 100 is used for protecting a battery pack, the bottom cover structure 100 has a receiving cavity, and a liquid cooling loop is configured in the receiving cavity, and the liquid cooling loop is provided with a cooling liquid for conducting heat with the battery pack.

It can be understood that the liquid cooling loop of the bottom protection plate structure 100 may combine with thermal management simulation and test conditions to form different water channel structure characteristics; when the consumer is in noon etc. of summer, the road surface is often shone the temperature and is up to 45 ℃, if not in time thermal-insulated, the temperature will be conducted to the electric core of battery package, aggravates the temperature rise of electric core, arouses unfavorable phenomena such as thermal runaway when serious, through adopting end backplate structure 100 back, the inside coolant liquid of end backplate structure 100 conducts the temperature away fast, makes the upper end temperature control of end backplate structure 100 is about 25 ℃, has just so realized thermal-insulated function.

At the in-process of above-mentioned realization, end backplate structure 100 is provided with the chamber that holds that has the liquid cooling return circuit, and liquid cooling return circuit circulation has the coolant liquid for when the battery package sets up in end backplate structure 100's upper end, end backplate structure 100 also can carry out the heat conduction to the battery package when can protecting the battery package, can improve the integrated level, reduce the assembly process, reduced the manual operation cost.

Referring to fig. 1 again, the bottom protection plate structure 100 includes a first bottom protection plate 101 and a second bottom protection plate 102, the first bottom protection plate 101 and the second bottom protection plate 102 are distributed along an up-down direction, and the first bottom protection plate 101 is connected to the second bottom protection plate 102 to form the accommodating cavity.

For example, the material used for the first backplate 101 includes, but is not limited to, an aluminum alloy and the like, and has good thermal conductivity, and the material used for the second backplate 102 includes, but is not limited to, an aluminum alloy and the like; the first bottom guard plate 101 and the second bottom guard plate 102 can be combined together by riveting or other techniques, so that the disassembly operation and the subsequent after-sale maintenance can be conveniently carried out.

In the process of the implementation, the first bottom protection plate 101 is connected with the second bottom protection plate 102, so that heat conduction can be performed on the battery pack, and the first bottom protection plate 101 and the second bottom protection plate 102 do not need to be coated with a PVC adhesive layer, and the first bottom protection plate 101 and the second bottom protection plate 102 both have corrosion resistance, so that weight reduction and production cost reduction are facilitated.

In some embodiments, the battery pack is disposed on a side of the first backplate 101 away from the second backplate 102, and the liquid cooling loop is disposed on a side of the first backplate 101 close to the second backplate 102. It should be noted that, when the battery pack is disposed above the first bottom protective plate 101, the first bottom protective plate 101 may serve as a load-bearing member of the battery module of the battery pack, and may also bear the load of the battery module through the frame structure 200 of the battery pack, which may be set according to actual situations, which is not described herein any more.

In the implementation process, the first bottom protective plate 101 is provided with the liquid cooling loop to conduct heat to the battery pack, and the second bottom protective plate 102 is arranged below the liquid cooling loop to protect the liquid cooling loop, effectively isolate heat radiated from a road surface and ensure the use safety of the battery pack.

In some embodiments, the thickness of the second backplate 102 is not less than the thickness of the first backplate 101. The safety of the product can be improved, the liquid cooling loop is prevented from being punctured, and the safety performance of the battery pack is improved.

In some embodiments, the thickness of the second backplate 102 is 0.8 to 3mm. When can play the protection, also can cooperate with first end backplate 101, realize the effect with battery package heat conduction.

In some embodiments, the structure of at least a portion of the second sole plate 102 is configured as a buffer zone located on a side of the second sole plate 102 remote from the first sole plate 101. For example, the buffer area may be correspondingly disposed below the battery modules of the battery pack, and other positions may also be included, which is not limited herein.

In the implementation process, the second bottom protection plate 102 is provided with a buffer area, so that when the second bottom protection plate 102 is subjected to stone impact and other conditions, the buffer area can well buffer the second bottom protection plate, the second bottom protection plate 102 is prevented from being broken down, and the liquid cooling loop and the battery pack are protected.

The inventor finds that some situations are unforeseen due to complexity of running conditions of the electric equipment, for example, the battery pack is knocked, but the driver does not necessarily find that the bottom protection plate structure 100 is knocked down due to environmental factors such as noise and rain, the coolant in the bottom protection plate structure is lost, and if the electric equipment continues to run, the temperature of the battery pack is rapidly increased, so that danger is increased.

In view of this, in some embodiments, the liquid cooling circuit is provided with a sensor for detecting the cooling liquid. Can detect the coolant liquid in the liquid cooling return circuit through setting up the sensor for when the liquid cooling return circuit is punctured and leads to the coolant liquid to reveal, the accessible sensor reports to the police, is convenient for take corresponding measure. It should be noted that the liquid cooling loop can be used to connect with an expansion tank of the electric device to form a circulating flow of the cooling liquid, and in other embodiments, the sensor can also be arranged inside the expansion tank, so that the detection of the loss of the cooling liquid caused by the collision of the liquid cooling loop can be realized.

As shown in fig. 2, in a second aspect, the present application also provides a battery pack, including: a plurality of battery modules; a frame structure 200 having a mounting cavity configured to receive the battery module; and a sole plate structure 100 according to any of the preceding claims, said sole plate structure 100 being configured to be connected to said frame structure 200. For example, the frame structure 200 and the bottom protection plate structure 100 may be connected by a bolt connection or a riveting connection, and welding the frame structure 200 and the bottom protection plate structure 100 is not excluded.

In the process of the above implementation, the battery module is accommodated in the installation cavity of the frame structure 200, and the frame structure 200 is connected with the bottom protection plate structure 100, so that the battery module can be fixed after being taken out, and the battery module is convenient to detach and maintain after sale.

Referring to fig. 2 again, the frame structure 200 includes a frame main body 201 and a support main body 202, the support main body 202 is configured to be connected with an inner edge of the frame main body 201 to form a plurality of the mounting cavities, and the support main body 202 is provided with a support portion 2021, and the support portion 2021 is configured to be used for mounting the battery module.

For example, the support main body 202 and the frame main body 201 may be formed into a whole by stamping, welding, or the like, the shape of the frame main body 201 is not particularly limited, and may be set according to practical application conditions, the support main body 202 may be set in a cross shape, and the periphery of the support main body 202 is connected to the inner edge of the frame main body 201, so as to form a plurality of mounting cavities, and the support main body 202 may improve the strength of the frame main body 201, and may also mount and fix the battery module, thereby ensuring that the battery module does not move during use.

In the process of the implementation, the supporting body 202 is connected with the frame body 201, and when the battery module is arranged in the installation cavity, the supporting portion 2021 of the supporting body 202 can support the battery module, so that the bearing force of the bottom protection plate structure 100 can be reduced, the deformation of the bottom protection plate structure 100 in the use process can be reduced, and the risk that the bottom protection plate structure 100 is broken down can be reduced.

In a third aspect, the present application further provides an electric device, including the battery pack according to any one of the above aspects. The electric equipment can be an electric toy, an electric tool, a battery car, an electric automobile, a spacecraft and the like, when the electric equipment is a vehicle, the vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extending automobile and the like. The interior of the vehicle is provided with a battery pack, which may be arranged at the bottom or at the head or tail of the vehicle. The battery pack may be used for power supply of the vehicle, for example, the battery pack may serve as an operation power source of the vehicle. The vehicle may also include a controller and a motor, the controller being configured to control the battery pack to power the motor, for example, for start-up, navigation, and operational power requirements while traveling of the vehicle.

Because the electric device provided in the third aspect of the present application includes the battery pack in the technical solution of the second aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

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 by those skilled in the art. Any modification, equivalent replacement, improvement and the like 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 bottom protective plate structure, bottom protective plate structure is used for protecting the battery package, its characterized in that, bottom protective plate structure has one and holds the chamber, it disposes the liquid cooling return circuit to hold the intracavity, the liquid cooling return circuit is provided with the coolant liquid, in order to be used for with the battery package carries out the heat conduction.

2. The bottom guard plate structure of claim 1, wherein the bottom guard plate structure comprises a first bottom guard plate and a second bottom guard plate, the first bottom guard plate and the second bottom guard plate are distributed along the up-down direction, and the first bottom guard plate and the second bottom guard plate are connected to form the accommodating cavity.

3. The backplate structure of claim 2, wherein the battery pack is disposed on a side of the first backplate remote from the second backplate, and the liquid cooling loop is disposed on a side of the first backplate close to the second backplate.

4. The floor sheathing structure according to claim 2, wherein the thickness of the second floor sheathing is not less than the thickness of the first floor sheathing.

5. The floor sheathing structure according to claim 2, wherein the second floor sheathing has a thickness of 0.8 to 3mm.

6. The floor sheathing structure of claim 2, wherein the structure of at least a portion of the second floor sheathing is configured as a cushioned region on a side of the second floor sheathing remote from the first floor sheathing.

7. The sole plate structure of claim 1, wherein said liquid cooling circuit is provided with a sensor for detecting said cooling liquid.

8. A battery pack, comprising:

a plurality of battery modules;

a frame structure having a mounting cavity configured to receive the battery module; and

the floor shield structure of any of claims 1-7, configured to be coupled to the frame structure.

9. The battery pack according to claim 8, wherein the frame structure includes a frame body and a support body, the support body is configured to be coupled to an inner edge of the frame body to form the mounting cavities, and the support body is provided with a support portion configured to mount the battery modules.

10. An electrical device comprising a battery pack according to any one of claims 8 to 9.

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