阅读说明：本技术 动力电池包壳体及动力电池包 (Power battery pack shell and power battery pack ) 是由 周道辉 辛明 赵文佳 于 2019-09-18 设计创作，主要内容包括：本发明提供了一种动力电池包壳体及动力电池包。本发明所述的动力电池包壳体主要包括构造有容纳腔的下壳体,与下壳体枢转连接的上壳体,且上壳体被构造为可与下壳体枢转而封堵容纳腔的开口；还包括连接件,相对于上壳体和下壳体枢转连接的一侧,连接件连接于开口的一侧,且连接件的两端分别与上壳体和下壳体可拆卸连接；并于连接件上构造有薄弱连接部,且薄弱连接部被构造为可因容纳腔内压力超过额定阈值压力而断裂损坏。本发明的动力电池包壳体通过在动力电池包上设置有上壳体、下壳体和连接件,可使动力电池包中的电池模组更为紧凑,同时,还改善电池模组由于不可抗力因素发生意外爆炸时壳体飞溅引起的危害人身安全的问题。(The invention provides a power battery pack shell and a power battery pack. The power battery pack shell mainly comprises a lower shell and an upper shell, wherein the lower shell is provided with a containing cavity, the upper shell is in pivot connection with the lower shell, and the upper shell is constructed to be capable of pivoting with the lower shell to seal an opening of the containing cavity; the connecting piece is connected to one side of the opening relative to one side of the upper shell and one side of the lower shell which are in pivot connection, and two ends of the connecting piece are respectively detachably connected with the upper shell and the lower shell; and a weakened connection is formed on the connecting piece, and the weakened connection is configured to break and damage due to the fact that the pressure in the accommodating cavity exceeds the rated threshold pressure. According to the power battery pack shell, the upper shell, the lower shell and the connecting piece are arranged on the power battery pack, so that a battery module in the power battery pack can be more compact, and meanwhile, the problem that the personal safety is damaged due to the fact that the shell splashes when force factors are not resisted and the power battery pack is accidentally exploded is solved.)

1. A power battery pack case, comprising:

the battery pack comprises a lower shell (1), wherein an accommodating cavity for accommodating a battery module (6) is formed in the lower shell (1), and the accommodating cavity is provided with an upward opening;

an upper housing (2), one end of the upper housing (2) is pivotally connected with the lower housing (1), and the pivotal connection position is positioned at one side of the opening, the upper housing (2) is configured to be capable of pivoting relative to the lower housing (1) to block the opening;

the connecting piece (3) is connected to the other side of the opening relative to one side of the upper shell (2) and the lower shell (1) in a pivoting connection mode, and two ends of the connecting piece (3) are detachably connected with the upper shell (2) and the lower shell (1) respectively; a weakened connecting part (302) is formed on the connecting part (3), and the weakened connecting part (302) is formed to be capable of being broken and damaged due to the pressure in the accommodating cavity exceeding the rated threshold value.

2. The power battery pack housing of claim 1, wherein: a mounting frame (4) is fixed in the accommodating cavity, a plurality of turns of grooves (407) are formed in the circumferential direction of the mounting frame (4), and the plurality of turns of grooves (407) are spirally arranged around the circumferential direction of the mounting frame (4); a multi-turn temperature control component (5) which is spirally arranged is embedded in the groove (407), the temperature control component (5) comprises a high temperature resistant pipe (501) with a water flow channel inside, and an electric heating wire (502) which is spirally wound on the circumferential direction of the high temperature resistant pipe (501).

3. The power battery pack housing of claim 2, wherein: and a radiating fin (401) protruding out of the mounting frame (4) is arranged between the grooves (407) of the adjacent turns, and the radiating fin (401) is spirally arranged around the circumference of the mounting frame (4).

4. The power battery pack housing of claim 2, wherein: the mounting frame (4) is made of aluminum material.

5. The power battery pack housing of claim 2, wherein: the electrical heating wire (502) is a carbon fiber heating wire.

6. The power battery pack housing of claim 1, wherein: the connecting piece (3) is L-shaped.

7. The power battery pack housing of claim 6, wherein: in the both ends of connecting piece (3) are equipped with first connecting hole (301) and second connecting hole (303) respectively, correspond to first connecting hole (301) in be formed with last casing connecting hole (202) on last casing (2), correspond to second connecting hole (303), in be equipped with on casing (1) down and to pass and locate convex column (101) in second connecting hole (303), connecting piece (3) via second connecting hole (303) cover is located on convex column (101) and via wearing to locate first connecting hole (301) with bolt in going up casing connecting hole (202) and connect go up casing (2) with casing (1) down.

8. The power battery pack housing according to any one of claims 1-7, wherein: the bottom of the lower shell (1) is fixedly connected with two mounting beams (403), the two mounting beams (403) are arranged in parallel, two ends of each mounting beam (403) are respectively provided with an extending end (404) extending outwards relative to the lower shell (1), and each extending end (404) is respectively provided with a mounting hole (405).

9. The power battery pack housing of claim 8, wherein: a reinforcing member (406) is connected between each of the overhanging ends (404) and the lower case (1).

10. A power battery pack is characterized in that: comprising a power battery pack housing according to any one of claims 1 to 9, and a battery module (6) secured in the receiving cavity.

Technical Field

The invention relates to the technical field of power batteries, in particular to a power battery pack shell. Meanwhile, the invention also relates to a power battery pack with the power battery pack shell.

Background

Due to the factors of large volume, high capacity, mature process technology, obvious price advantage, no pollution and the like, the square lithium ion battery is increasingly used in electric vehicles and other energy storage items. In the application process, the plurality of single square lithium ion batteries are connected in series and in parallel to form a battery pack, and the battery pack can perform chemical reaction in the process of storing and releasing electric energy, so that the real-time temperature of the battery pack can also change.

Temperature is one of the important factors affecting the battery capacity and life, and during the operation of the battery, the battery capacity and life are affected by higher temperature and lower temperature. The battery is controlled to work in a relatively stable temperature interval, the temperature consistency of the battery module is improved, the performance of the battery can be improved, and the service life of the battery is greatly prolonged.

Meanwhile, in the processes of charging and discharging, collision, wading and the like of the electric automobile, the lithium ion battery is subjected to the play and extrusion of a system, so that the phenomena of battery short circuit, cracking, electric leakage, thermal shock, explosion, combustion and the like can be caused. In the use of global electric automobiles, a plurality of fire-starting combustion accidents are occurred, and the battery combustion can cause the splashing of a battery shell to easily harm the personal safety.

Disclosure of Invention

In view of the above, the present invention is directed to a power battery pack case to enhance the stability of the power battery pack case. In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a power battery pack case, comprising:

the battery pack comprises a lower shell, a battery pack and a battery pack, wherein a containing cavity for containing a battery module is formed in the lower shell, and the containing cavity is provided with an upward opening;

an upper housing having one end pivotally connected to the lower housing at a position on one side of the opening, the upper housing being configured to pivot relative to the lower housing to close the opening;

the connecting piece is connected to the other side of the opening relative to one side of the upper shell and the lower shell which are in pivot connection, and two ends of the connecting piece are detachably connected with the upper shell and the lower shell respectively; a weakened connection is formed on the connecting part and is designed to be broken or damaged by a pressure in the receiving chamber exceeding a target threshold value.

Furthermore, a mounting rack is fixed in the accommodating cavity, a plurality of turns of grooves are formed in the circumferential direction of the mounting rack, and the plurality of turns of grooves are spirally arranged around the circumferential direction of the mounting rack; the groove is internally embedded with a multi-turn temperature control assembly which is spirally arranged, the temperature control assembly comprises a high-temperature resistant pipe with a water flow channel inside, and an electric heating wire which is spirally wound on the circumferential direction of the high-temperature resistant pipe.

Furthermore, cooling fins protruding out of the mounting rack are arranged between the grooves of the adjacent turns, and the cooling fins are spirally arranged around the circumferential direction of the mounting rack.

Further, the mounting bracket is made of an aluminum material.

Further, the electric heating wire is a carbon fiber heating wire.

Further, the shape of the connecting piece is L-shaped.

Furthermore, a first connecting hole and a second connecting hole are respectively arranged at two ends of the connecting piece, an upper shell connecting hole is formed in the upper shell corresponding to the first connecting hole, a convex column capable of being arranged in the second connecting hole is arranged on the lower shell corresponding to the second connecting hole, and the connecting piece is sleeved on the convex column through the second connecting hole and is connected with the upper shell and the lower shell through bolts arranged in the first connecting hole and the upper shell connecting hole.

Furthermore, the bottom of the lower shell is fixedly connected with two mounting beams which are arranged in parallel, two ends of each mounting beam are respectively provided with an extending end which extends outwards relative to the lower shell, and each extending end is respectively provided with a mounting hole.

Furthermore, a reinforcing member is respectively connected between each of the overhanging ends and the lower shell.

Compared with the prior art, the invention has the following advantages:

(1) according to the power battery pack shell, the upper shell, the lower shell and the connecting piece are arranged on the power battery pack at the same time, and the weak part is formed on the connecting piece, so that the structure of a power battery module in the power battery pack can be ensured to be more compact, and meanwhile, the problem that the personal safety is damaged due to battery splashing when unexpected combustion and explosion happen to the power battery pack due to inefficient force factors is solved.

(2) The power battery holding cavity is internally fixed with a mounting rack with a plurality of turns of grooves, and a temperature control assembly is arranged in the groove of the mounting rack, so that the space in the power battery holding cavity is more compact, the temperature of a battery module in the mounting rack is controllable within a certain range, and the service environment of the battery is improved.

(3) And a radiating fin is arranged between the adjacent grooves, so that the radiating effect of the battery in the use process can be further enhanced.

(4) The mounting bracket is made of aluminum materials, so that the power battery pack is light in overall weight and has a good heat conduction effect.

(5) The electric heating wire is a carbon fiber heating wire, has the characteristics of energy conservation, no instantaneous current impact, high heat radiation direction, environmental protection and corrosion resistance, and enhances the use effect.

(6) One end of the connecting piece is sleeved on the convex column through the connecting hole, and the other end of the connecting piece is connected with the upper shell through the connecting piece penetrating through the connecting hole and the upper shell, so that the upper shell and the lower shell of the power battery pack shell can be conveniently connected, and the battery module in the shell can be conveniently detached and installed.

(7) The bottom of the lower shell of the power battery pack shell is fixedly connected with the mounting beam, the two ends of the mounting beam further extend out of the extending ends of the lower shell, and mounting holes are formed in the mounting beam and used for being connected with a vehicle body, so that the power battery pack shell is conveniently mounted on the vehicle body.

(8) And the extending end and the lower shell are respectively connected with a reinforcing piece to reinforce the connection strength of the power battery pack shell.

Another object of the present invention is to provide a power battery pack, which includes the power battery pack housing as above, and further includes a battery module fixed in the accommodating cavity.

Compared with the prior art, the power battery pack provided by the invention has the same beneficial effects as the power battery pack shell, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a power battery pack housing according to a first embodiment of the invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a top view of FIG. 1

Fig. 5 is a schematic structural diagram of a mounting frame according to a first embodiment of the invention;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a schematic structural diagram of a connecting member according to a first embodiment of the present invention;

description of reference numerals:

1-a lower shell, 2-an upper shell, 3-a connecting piece, 4-a mounting rack, 5-a temperature control assembly and 6-a battery module;

101-convex column;

201-pivot axis, 202-upper housing attachment hole;

301-first connection hole, 302-weak connection part, 303-second connection hole;

401-heat sink, 403-mounting beam, 404-overhanging end, 405-mounting hole, 406-stiffener, 407-groove;

501-high temperature resistant pipe, 502-electric heating wire.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The embodiment relates to a power battery pack shell, which is structurally an external frame of a power battery pack and is used as a main structural part of the power battery pack, so that the temperature of a battery module 6 is in a controllable interval, and the structure is safer. Referring to fig. 1 and 2, the power battery pack case mainly includes a lower case 1, an upper case 2, and a connecting member 3. Wherein, it holds the chamber to construct in lower casing 1 for install battery module 6, holds the intracavity and still is fixed with mounting bracket 4, is used for fixing battery module 6.

The structure of the lower case 1 will be described first, referring to fig. 1, the lower case 1 is a channel-shaped rectangular parallelepiped formed by injection molding of a light metal, a housing cavity for housing the battery module 6 is constructed in the lower case 1, the battery module 6 is conveniently mounted, an opening is formed in the housing cavity, the opening is disposed upward, and the opening is connected to the upper case 2 through a pivot shaft 201 described below.

The groove-shaped edge of the lower housing 1 near the opening is provided with a convex column 101. Here, the post 101 is provided in a cylindrical shape in the present embodiment, but may be configured in other shapes. The convex column 101 is mainly used for connecting and fixing the upper shell 2 and the lower shell 1 by the connecting piece 3.

Two mounting beams 403 are further fixed at the bottom end of the lower casing 1, as shown in fig. 1 to 4, through holes are intermittently formed in the mounting beams 403, threaded holes corresponding to the through holes of the mounting beams 403 are also formed in the lower casing 1 of the power battery pack, and the lower casing 1 and the mounting beams 403 are fixedly connected through screws penetrating through the through holes. The mounting beam 403 is fixed on the lower shell 1, and two ends of the mounting beam extend out of the bottom surface of the lower shell 1 to form an extending end 404, and a mounting hole 405 is formed in the extending end 404, so that the battery module 6 can be conveniently mounted and the power battery pack shell can be conveniently and fixedly connected with the vehicle body. A reinforcing member 406 is further connected between the overhanging end 404 and the lower case 1, and is formed in a right triangle shape and spot-welded to the overhanging end 404 and the main body of the lower case 1, respectively, to further enhance the strength of the mounting beam 403.

At one end where the opening of the lower case 1 is provided, the power battery pack case is further constructed with an upper case 2 for blocking the opening and for covering and protecting the battery module 6 in the lower case 1, as shown in fig. 3 and 4, the upper case 2 is in the shape of a thin square cap formed of a light metal, and an upper case connection hole 202 is opened at one side of the upper case 2 for fixing with a connecting member 3 described below. One end far away from the upper shell connecting hole 202 is connected with the groove-shaped frame of the lower shell 1 through a pivot shaft 201 relative to the other end edge of the convex column 101, so that the purpose that the upper shell 2 flexibly rotates around the pivot shaft 201 to open and close the power battery pack shell can be achieved.

In the present power battery pack case, a connecting member 3 is also constructed for fixation of the upper case 2 and the lower case 1. As shown in fig. 2 and 7, the connecting member 3 is L-shaped, and has a first connecting hole 301 and a second connecting hole 303 respectively formed at two ends thereof, wherein the first connecting hole 301 corresponds to the upper housing connecting hole 202 of the upper housing 2 and is fixed by a screw inserted into the two holes; the second connection hole 303 corresponds to the protruding pillar 101 of the lower casing 1, and the hole diameter thereof is slightly larger than the protruding pillar 101, so that the second connection hole 303 can be sleeved on the protruding pillar 101 to form a fixed connection between the upper casing 2 and the lower casing 1. A weak link portion 302 is formed on the link member 3, and both sides of the weak link portion 302 are provided with recesses formed on the link member 3 so that the weak link portion 302 is small in size, whereby the weak link portion 302 is broken and damaged when a certain tensile force is applied. The set threshold pressure can be set as desired, i.e., the recess range of the weakened connection 302 can also be flexibly adjusted.

As shown in fig. 6, the mounting frame 4 is further fixed inside the accommodating cavity of the lower casing 1 by screws, the mounting frame 4 is integrally a rectangular annular aluminum frame which is through from top to bottom, and the four sides of the mounting frame 4 are further circumferentially surrounded by a plurality of turns of grooves 407, and the grooves 407 are spirally arranged around the circumference of the mounting frame 4.

A multi-turn temperature control assembly 5 spirally wound on the mounting rack 4 along the concave groove 407 is further embedded in the concave groove 407, referring to fig. 5 and 6, the multi-turn temperature control assembly includes a high temperature resistant pipe 501, liquid such as water flow or cooling liquid can pass through the high temperature resistant pipe 501 to form a spiral loop, and the high temperature resistant pipe 501 can be directly connected with an external supply device, so that water circularly flows through the high temperature resistant pipe 501, and thus the battery module installed in the mounting rack 4 can be cooled when working at a high temperature; the temperature control component 5 further includes an electric heating wire 502, and the electric heating wire 502 is spirally wound around the body of the high temperature resistant pipe 501 and is finally spirally wound in the concave slot 407 of the mounting rack 4 along with the high temperature resistant pipe 501. Here, the electrical heating wire 502 in this embodiment is preferably a carbon fiber heating wire, which can be connected to an external power supply device, and when the electrical heating wire is powered on, the carbon fiber heating wire generates heat, so as to heat the battery module, thereby improving the working environment of the battery module 6 in cold weather in winter.

In order to further improve the heat dissipation effect of the battery module 6 at high temperature, a heat dissipation plate 401 is further provided on the mounting bracket 4 between the adjacent concave grooves 407, as shown in fig. 5 and 6, the heat dissipation plate 401 protrudes outward from the mounting bracket 4 and is spirally arranged along the mounting bracket 4. Can heat the battery module when cold weather, and can prevent to have a part calorific loss along with fin 401 because of the battery module performance decline that the temperature leads to excessively, the heat that electric heater wire 502 work produced, nevertheless consider that battery module 6 often easily is in continuous operating condition makes its temperature of self last higher in the car working process, so add fin 401 on mounting bracket 4 to better balanced battery module 6 operating temperature.

When the automobile is started in low-temperature weather, the electric heating wire 502 in the temperature control assembly 5 can be electrified, and the peripheral temperature of the battery module in the accommodating cavity of the lower shell 1 is increased, so that the working environment of the battery is improved; after the automobile runs for a period of time, the temperature of the battery rises, a water flow channel of the high-temperature resistant pipe 501 in the temperature control component 5 can be opened, water flow forms circulation to cool the periphery of the mounting rack 4, and meanwhile the cooling fins 401 further play a role in cooling.

When the automobile battery module 6 explodes accidentally due to some factors, the power battery pack shell can play a role in buffering the automobile battery module, meanwhile, when the shell receives a large impact force, the weak connecting part 302 of the connecting piece 3 is broken, the upper shell 2 is lifted, and the pivot shaft 201 rotates along with the lower shell 1, so that the automobile battery module cannot splash to prevent the injury of personnel on the automobile.

Example two

Relate to a power battery package in this embodiment, including power battery package casing to and be fixed in power battery package casing hold the chamber in battery module. The power battery pack case and the battery module thereof can be referred to the description of the first embodiment, and other structures of the power battery pack can be referred to the existing structures.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.