CN214627627U - Battery pack circuit breaking unit shell, battery pack circuit breaking unit, battery pack and vehicle - Google Patents

Abstract

A battery pack breaking unit case, a battery pack breaking unit, a battery pack, and a vehicle, wherein the battery pack breaking unit case includes: a lower case (10); the lower shell (10) comprises a bottom wall (11) and a side wall (12) arranged around the edge of the bottom wall (11), and the bottom wall (11) and the side wall (12) form a containing groove together; and the bottom wall (11) comprises a framework body, a wiring harness wiring groove (112) formed in the framework body and a hollow groove (113) used for forming a truss structure. The utility model discloses a be provided with the fretwork groove that is used for forming truss structure on the diapire of casing under the unit that opens circuit with the battery package, can strengthen the internal heat transfer of battery package to alleviate the weight of battery package unit that opens circuit, realize lightweight purpose, pencil wiring groove (112) on the skeleton body simultaneously can subtract heavy on the one hand, and on the other hand is convenient for reasonable layout pencil.

Description

Battery pack circuit breaking unit shell, battery pack circuit breaking unit, battery pack and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to battery package unit casing, battery package unit, battery package and vehicle that open circuit.

Background

Along with the improvement of the energy density of a battery system and the increase of the endurance mileage of a new energy automobile, the electric quantity reserve in the battery pack is continuously increased and the voltage is continuously enhanced. The pack disconnection unit, which is a high voltage distribution device of the battery system, is under increasing voltage and current, and needs to be modified, for example, the wires need to be thickened, in order to bear more voltage and current, which results in an increase of the internal heat. And the existing battery pack circuit breaking unit has larger weight, which is not beneficial to achieving the purpose of light weight.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

The utility model aims at providing a can strengthen inside heat transfer and the battery package that the quality is lighter unit casing, battery package unit, battery package and vehicle of opening circuit.

(II) technical scheme

In order to solve the above problem, a first aspect of the present invention provides a battery pack open circuit unit casing, including: a lower housing; the lower shell comprises a bottom wall and a side wall arranged around the edge of the bottom wall, and the bottom wall and the side wall jointly form an accommodating groove; and the bottom wall comprises a framework body, a wiring harness wiring groove and a hollow groove, wherein the wiring harness wiring groove is formed in the framework body, and the hollow groove is used for forming a truss structure.

Optionally, the wire harness routing groove is disposed on a side of the bottom wall facing away from the side wall.

Optionally, the battery pack disconnection unit housing further includes: the upper shell is provided with a convection hole penetrating through the top wall opposite to the bottom wall, and the convection hole and the hollow groove form a convection heat exchange structure.

Optionally, the convection holes are first strip-shaped holes, at least two first strip-shaped holes are formed in the convection holes, and the convection holes are arranged adjacent to the first strip-shaped holes at intervals; the hollow-out groove is the second bar hole, the second bar hole is two at least, and is adjacent the second bar hole interval sets up, just the length direction in first bar hole with the length direction in second bar hole is unanimous.

Optionally, a supporting groove is formed in one side of the side wall, which is far away from the bottom wall, and a groove bottom of the supporting groove is abutted to an edge of the upper shell to support the upper shell. In other words, the side wall comprises an inner wall and an outer wall that are integrally formed; the inner wall protrudes from the outer wall at a side away from the bottom wall to support the upper shell.

Optionally, a first mounting assembly is arranged on the bottom wall, the first mounting assembly includes a first mounting hole and a second mounting hole, the first mounting hole is arranged on the framework body, the second mounting hole is arranged on the mounting table, and the first mounting hole and the second mounting hole are used for mounting the battery pack circuit breaking unit device; the mounting table is positioned on the bottom wall and is arranged on the framework body or the edge of the framework body; the battery pack circuit breaking device is characterized in that a second mounting assembly is arranged on the side wall and comprises a third mounting hole and a fourth mounting hole, the third mounting hole is formed in a fixing portion, extending towards the periphery, of the side wall, the fourth mounting hole is formed in a first supporting surface of one side, far away from the bottom wall, of the side wall, the third mounting hole is used for fixing a battery pack circuit breaking unit shell on a battery pack, and the fourth mounting hole and a fifth mounting hole, close to the edge of the upper shell and arranged on the edge of the upper shell, are oppositely arranged so as to fix the lower shell and the upper shell.

Optionally, a mounting protrusion is arranged on a mounting table located at the edge of the framework body, the mounting protrusion is far away from the mounting table and extends, and the mounting protrusion is used for mounting the battery pack circuit breaking unit device.

The utility model discloses a second aspect provides a battery package unit that opens circuit, include if the utility model discloses a battery package unit casing that opens circuit that the first aspect provided still includes: the battery pack opens the unit device.

A third aspect of the present invention provides a battery pack, including the battery pack circuit breaking unit of the second aspect of the present invention.

A fourth aspect of the present invention provides a vehicle, including a battery pack according to the third aspect of the present invention.

(III) advantageous effects

The above technical scheme of the utility model has following profitable technological effect:

through be provided with the fretwork groove that is used for forming truss structure on the diapire with battery package circuit breaking unit lower casing, can strengthen the internal heat transfer of battery package to alleviate the weight of battery package circuit breaking unit, realize lightweight purpose, pencil wiring groove on the skeleton body simultaneously can subtract the weight on the one hand, and on the other hand is convenient for rationally distribute the pencil.

Drawings

Fig. 1 is a bottom view of a bottom wall of a case of a battery pack disconnection unit according to a first embodiment of the present invention;

fig. 2 is a bottom view of the bottom wall of the battery pack according to the first embodiment of the present invention after the connection of the disconnecting unit;

fig. 3 is a schematic structural view of a lower case of a battery pack disconnection unit according to a first embodiment of the present invention;

fig. 4 is a schematic top view of the circuit breaking unit of the battery pack according to the first embodiment of the present invention after the lower case is mounted with the electric component;

fig. 5 is a perspective view of the lower case of the disconnection unit for a battery pack according to the first embodiment of the present invention after mounting an electric component thereon;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

fig. 7 is a schematic structural view of an upper case of a battery pack disconnection unit according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a case of a battery pack disconnection unit according to a first embodiment of the present invention;

fig. 9 is a schematic view of the connection between the upper case and the lower case of the disconnection unit for a battery pack according to the first embodiment of the present invention;

fig. 10 is an enlarged view of the connection between the upper case and the lower case of the disconnection unit for a battery pack according to the first embodiment of the present invention;

FIG. 11 is a cross-sectional view A-A of the battery pack disconnect unit housing of FIG. 8;

fig. 12 is a partial enlarged view of fig. 11 at B.

Reference numerals:

10: a lower housing; 11: a bottom wall; 111: a wire passing hole; 112: a wire harness routing groove; 113: hollowing out the grooves; 114: a first mounting hole; 1141: a boss; 115: mounting a boss; 116: a second mounting hole; 117: an installation table; 12: a side wall; 121: a first support surface; 13: a fixed part; 131: a fourth mounting hole; 132: fixing the steel sleeve; 14: a third mounting hole; 15: fixing the buckle; 20: an upper housing; 21: a convection hole; 22: a second support surface; 221: a fifth mounting hole;

101: the BDU inputs the positive copper bar; 102: a Hall sensor; 103: a set screw; 104: a fuse; 105: the fuse outputs the copper bar; 106: a main circuit relay; 107: outputting the positive copper bar; 108: outputting a negative copper bar; 109: the BDU inputs the negative copper bar; 1010: a pre-charging relay; 1011: a small safety input copper bar; 1012: small insurance; 1013: fixing a nut; 1014: a small safety output copper bar; 1015: a high voltage connector; 1016: a low voltage connector; 1017: and (5) pre-charging the resistor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

A schematic diagram of a layer structure according to an embodiment of the invention is shown in the drawing. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as actually required.

First embodiment

Referring to fig. 1 and 2, the present embodiment provides a battery pack breaking unit case including: a lower case 10; the lower shell 10 comprises a bottom wall 11 and a side wall 12 arranged around the edge of the bottom wall 11, wherein the bottom wall 11 and the side wall 12 together form a receiving groove; and, the bottom wall 11 includes a skeleton body, a wiring harness wiring groove 112 separately provided on the skeleton body, and a hollowed groove 113 for forming a truss structure. The harness routing groove 112 is provided on the side of the bottom wall 11 remote from the side wall 12 to provide spatial support for the harness routing of the electrical components while not interfering with the routing of the battery pack disconnect unit devices in the receiving slots. The holding tank is used for installing the battery pack breaking unit device. Lower casing 10 of cell package unit that opens circuit mainly plays the bearing effect, this embodiment sets up the fretwork groove 113 that is used for forming the truss structure on the diapire 11 of cell package unit lower casing 10 that opens circuit, the truss structure can be at the bearing, when satisfying self intensity, save material quantity, strengthen the internal heat transfer of cell package, and alleviate the weight and the reduce cost of cell package unit that opens circuit, realize lightweight purpose, pencil wiring groove 112 on the skeleton body simultaneously, can subtract heavy on the one hand, on the other hand is convenient for reasonable layout pencil.

Referring to fig. 2, in an alternative embodiment, the bottom wall 11 is provided with a wire passing hole 111, a wire harness binding hole and a hollow groove 113 as required. And a wire through hole 111 provided near the wire harness wiring groove 112 to provide a passage for the wire harness to pass from the outside of the battery pack disconnecting unit case to the inside of the battery pack disconnecting unit case.

Referring to fig. 3, in an alternative embodiment, a first mounting assembly is disposed on the bottom wall 11, the first mounting assembly includes a first mounting hole 114 and a second mounting hole 116, the first mounting hole 114 is disposed on the framework body, the second mounting hole 116 is disposed on the mounting platform 117, and the first mounting hole 114 and the second mounting hole 116 are used for mounting the battery pack breaker unit device; wherein, the mounting platform 117 is located on the bottom wall 11 and is disposed on the framework body or on the edge of the framework body. Preferably, the mounting platform 117 is disposed around the edge of the framework body, and the mounting platform 117 may be inserted into the middle of the framework body, so as to stabilize the structure of the bottom wall 11. Alternatively, the first and second mounting holes 114 and 116 may be internally threaded as desired. The pack disconnection unit device may be provided with a through hole through which a bolt is passed when the pack disconnection unit device is mounted, and is tightened with an internal thread in the first mounting hole 114 to mount the pack disconnection unit device. The battery pack disconnect unit device may also be fixedly attached with a bolt that is tightened with internal threads in the first mounting hole 114 for fixation when installed. Optionally, the edge of the first mounting hole 114 extends into the receiving groove to form a boss 1141, a groove having the same shape and size as the boss 1141 is formed at the bottom of the battery pack disconnection unit device, and the boss 1141 is matched with the groove to clamp the battery pack disconnection unit device for fixing. The second mounting hole 116 may be configured to be the same as or different from the first mounting hole 114 as desired.

Referring to fig. 3, in an alternative embodiment, mounting bosses 115 are provided on mounting platforms 117 at the edges of the framework body, the mounting bosses 115 being arranged to extend away from the mounting platforms 117; the mounting protrusion 115 is used to mount the battery pack disconnection unit device, and is specifically disposed inside the battery pack disconnection unit device to mount the battery pack disconnection unit device. Optionally, an external thread is provided on the mounting protrusion 115. The pack breaking unit device may be provided with an internal thread matching the external thread to be screwed with the mounting protrusion 115 for fixation. Alternatively, the battery pack breaking unit device is provided with a through hole through which the mounting protrusion 115 passes to be screwed with a nut for mounting the battery pack breaking unit device when mounting.

Referring to fig. 5 and 6, in an alternative embodiment, a second mounting assembly is provided on the side wall, the second mounting assembly includes a third mounting hole 131, the third mounting hole 131 is provided on the fixing portion 13 of the side wall 12 extending toward the periphery thereof, and the third mounting hole 131 is used for fixing the battery pack breaking unit housing to the battery pack. Optionally, the fixing portions 13 are fixing corners disposed on the side wall 12 near one side of the bottom wall 11, and are used for providing supporting points for connecting the battery pack disconnection unit with the battery pack, specifically, the number of the fixing corners can be set according to actual needs, as shown in fig. 5, the four fixing corners are disposed near four corners of the rectangular bottom wall, so that the fixing and connecting effects are better; a fixed steel sleeve 132 is arranged in the third mounting hole 131; the fixing of the battery pack circuit breaking unit is realized by penetrating a fixing steel sleeve 132 through a screw; the retaining steel sleeve 132 provides support for the screws during tightening to prevent the fixation angle from being damaged by excessive pressure.

Referring to fig. 7 to 10, in an alternative embodiment, the second mounting assembly of the above embodiment further includes a fourth mounting hole 14, and the fourth mounting hole 14 is disposed on the first supporting surface 121 on the side of the side wall 12 away from the bottom wall 11. Specifically, the battery pack disconnection unit case further includes: and an upper case 20 snap-coupled to the lower case 10. Further specifically, the edge of the upper casing 20 is provided with a second supporting surface 22, the second supporting surface 22 is provided with a fifth mounting hole 221, the fourth mounting hole 14 and the fifth mounting hole 221 are arranged opposite to each other to realize fixation between the lower casing 10 and the upper casing 20, and specifically, the fixing buckle 15 can pass through the fourth mounting hole 14 and the fifth mounting hole 221 to realize fixation between the upper casing 20 and the lower casing 10. The upper shell 20 may be provided with a reinforcing structure as required to reinforce the strength of the upper shell 20, and the reinforcing structure may be any one of the existing structures, such as a reinforcing beam, a reinforcing rib, etc., but the present invention is not limited thereto.

In an alternative embodiment, the upper case 20 is made of an insulating material, and the thickness of the upper case 20 is 0.3mm to 0.7 mm. The upper housing 20 may be formed by a blister molding process. The upper case 20 thus formed can be made as thin as possible to achieve the purpose of light weight. Since the upper case 20 is to electrically protect the inside and thus cannot be broken, the specific thickness of the upper case 20 may be set according to the breakdown voltage of the pack breaking unit. The upper case 20 and the lower case 10 together form a relatively closed receiving space to receive and protect the pack disconnection unit device.

Referring to fig. 7 to 9, in an alternative embodiment, the upper housing 20 is provided with a convection hole 21. The convection hole 21 may cooperate with the hollowed-out groove 113 on the bottom wall 11 to realize the convection heat dissipation of the battery pack breaking unit. Preferably, the convection hole 21 corresponds to the hollow groove 113 in the height direction of the case of the pack breaking unit, and the shape and size of the convection hole 21 are the same as those of the hollow groove 113, so as to better dissipate heat.

Referring to fig. 7 to 9, in an alternative embodiment, a convection hole 21 is formed through a top wall of the upper housing 20 opposite to the bottom wall 11, and the convection hole 21 and the hollow groove 113 form a convection heat exchange structure. Preferably, the convection holes 21 are first strip-shaped holes, at least two first strip-shaped holes are formed, and adjacent first strip-shaped holes are arranged at intervals; the hollow-out grooves 113 are second strip-shaped holes, at least two second strip-shaped holes are formed, and adjacent second strip-shaped holes are arranged at intervals; and the length direction of the first strip-shaped hole is consistent with that of the second strip-shaped hole, so that the heat exchange of the heat convection structure is smoother.

Referring to fig. 11 and 12, in an alternative embodiment, a side of the side wall 12 away from the bottom wall 11 is provided with a support groove, and a groove bottom of the support groove abuts against an edge of the upper case 20 to support the upper case 20. Preferably, the support groove is provided with a groove wall only on the inner side of the side wall 12, when the upper housing 20 is connected to the side wall 12, the lower end of the upper housing 20 abuts against the groove bottom, the inner side of the upper housing 20 contacts with the groove wall, when the upper housing 20 is subjected to an external force, the inner side of the upper housing 20 is pressed against the groove wall, and the groove wall provides an outward support force for the upper housing 20 to prevent the upper housing 20 from being recessed inwards or damaged under the external force.

Second embodiment

This embodiment provides a battery package unit that opens circuit, include if the utility model discloses a battery package unit casing that opens circuit that first embodiment provided still includes: the battery package unit device that opens circuit, the battery package unit device that opens circuit most sets up in the holding tank.

Referring to fig. 2 and 4, in an alternative embodiment, a battery pack disconnection unit device includes: the BDU input positive copper bar 101, the Hall sensor 102, the fuse 104, the fuse output copper bar 105, the main circuit relay 106, the output positive copper bar 107, the output negative copper bar 108, the BDU input negative copper bar 109, the pre-charging relay 1010, the small fuse input copper bar 1011, the small fuse 1012, the fixing nut 1013, the small fuse output copper bar 1014, the high-voltage connector 1015, the low-voltage connector 1016 and the pre-charging resistor 1017.

The small fuse 1012 is used to provide a fuse for the non-powered electrical part of the electric train, such as the lamps. The hall sensor 102 is electrically connected with the positive copper bar 101 and is used for detecting the current input into the positive copper bar 101 by the BDU. The hall sensor 102 is also electrically connected to the fuse 104, and if the circuit is shorted, the fuse 104 opens to protect the circuit. The pre-charge resistor 1017 is disposed on a side of the bottom wall 11 away from the side wall. The pre-charging relay 1010 is electrically connected with the pre-charging resistor 1017 and is used for pre-charging when the whole vehicle is powered on. The BDU input positive copper bar 101 and the BDU input negative copper bar 109 control the electrical input or output of the whole battery pack circuit breaking unit, the connection and disconnection of the BDU input negative copper bar 109 are controlled through control signals, and the connection and disconnection of the whole circuit can be realized.

Referring to fig. 4, in an alternative embodiment, the battery pack breaking unit device may be mounted to the battery pack breaking unit housing through the first mounting hole 114, the second mounting hole 116, and the mounting protrusion 115. Specifically, the BDU input positive copper bar 101, the Hall sensor 102, the fuse 104 and the BDU input negative copper bar 109 are installed on the shell of the battery pack circuit-breaking unit through the second installation hole 116; the fuse output copper bar 105, the main circuit relay 106, the output anode copper bar 107 and the output cathode copper bar 108 are arranged on the shell of the battery pack circuit breaking unit through first mounting holes 114; the small safety input copper bar 1011, the small safety 1012 and the small safety output copper bar 1014 are arranged on the shell of the battery pack circuit-breaking unit through the mounting protrusions 115. The pre-charging relay 1010, the high-voltage connector 1015 and the low-voltage connector 1016 can be connected through the first mounting hole 114, the second mounting hole 116 or the mounting protrusion 115, or can be fixed through other structures, for example, a clamping groove can be further formed on the bottom wall 11, and the pre-charging relay 1010 and the low-voltage connector 1016 are clamped in the clamping groove; the sidewall 12 may be provided with a fixing hole, and the fixing screw 103 passes through the fixing hole to connect with the high voltage connector 1015 to fix the high voltage connector 1015.

The same parts of this embodiment as those of the first embodiment will not be described herein.

Third embodiment

This embodiment provides a battery pack, including as the utility model discloses a battery pack unit that opens circuit that second embodiment provided.

The same parts of this embodiment as those of the second embodiment will not be described herein.

Fourth embodiment

This embodiment provides a vehicle, including as the utility model discloses a third embodiment provides a battery package.

The same parts of this embodiment as those of the third embodiment will not be described herein.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A battery pack disconnect unit housing, comprising: a lower case (10);

the lower shell (10) comprises a bottom wall (11) and a side wall (12) arranged around the edge of the bottom wall (11), and the bottom wall (11) and the side wall (12) form a containing groove together; and the number of the first and second groups,

the bottom wall (11) comprises a framework body, a wiring harness wiring groove (112) formed in the framework body and a hollow groove (113) used for forming a truss structure.

2. The battery pack disconnection unit housing according to claim 1, wherein the wire harness routing groove (112) is provided on a side of the bottom wall (11) facing away from the side wall (12).

3. The battery pack breaking unit housing according to claim 1 or 2, further comprising: the upper shell (20), the upper shell (20) with set up on the relative roof of diapire (11) and run through convection hole (21) of roof, convection hole (21) with fretwork groove (113) form the heat convection structure.

4. The battery pack disconnect unit housing of claim 3,

the convection holes (21) are first strip-shaped holes, at least two first strip-shaped holes are formed, and the convection holes are arranged adjacent to the first strip-shaped holes at intervals;

the hollow-out grooves (113) are second strip-shaped holes, at least two second strip-shaped holes are formed, and the adjacent second strip-shaped holes are arranged at intervals;

and the length direction of the first strip-shaped holes is consistent with that of the second strip-shaped holes.

5. The battery pack disconnect unit housing of claim 3,

one side of the side wall (12) far away from the bottom wall (11) is provided with a supporting groove, and the groove bottom of the supporting groove is abutted against the edge of the upper shell (20) so as to support the upper shell (20).

6. The battery pack disconnect unit housing of claim 3,

a first mounting assembly is arranged on the bottom wall (11), the first mounting assembly comprises a first mounting hole (114) and a second mounting hole (116), the first mounting hole (114) is arranged on the framework body, the second mounting hole (116) is arranged on a mounting table (117), and the first mounting hole (114) and the second mounting hole (116) are used for mounting the battery pack circuit breaking unit device; wherein the mounting table (117) is positioned on the bottom wall (11) and is arranged on the framework body or at the edge of the framework body;

the battery pack circuit breaking unit casing is characterized in that a second mounting assembly is arranged on the side wall (12), the second mounting assembly comprises a third mounting hole (131) and a fourth mounting hole (14), the third mounting hole (131) is formed in a fixing portion (13) of the side wall (12) extending towards the periphery of the side wall, the fourth mounting hole (14) is formed in a first supporting face (121) of one side, far away from the bottom wall (11), of the side wall (12), the third mounting hole (131) is used for fixing the battery pack circuit breaking unit casing to a battery pack, and the fourth mounting hole (14) is opposite to a fifth mounting hole (221) which is close to the edge of the upper casing (20) and is formed in the upper casing (20) so that the lower casing (10) and the upper casing (20) can be fixed.

7. The battery pack disconnect unit housing of claim 6, wherein a mounting tab (115) is provided on a mounting platform (117) at an edge of the skeletal body, the mounting tab (115) extending away from the mounting platform (117), the mounting tab (115) being configured to mount the battery pack disconnect unit device.

8. A battery pack disconnection unit comprising the battery pack disconnection unit housing according to any of claims 1-7, further comprising: the battery pack opens the unit device.

9. A battery pack comprising the battery pack disconnection unit according to claim 8.

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

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