CN218351588U

CN218351588U - Wire harness isolation assembly and electric box

Info

Publication number: CN218351588U
Application number: CN202222717749.0U
Authority: CN
Inventors: 吴布维; 翁永强; 岳洪亮; 张诗颖; 赵东炎
Original assignee: Huai'an Junsheng New Energy Technology Co ltd; Sinochem Yangzhou Lithium Battery Technology Co Ltd
Current assignee: Huai'an Junsheng New Energy Technology Co ltd; Sinochem Yangzhou Lithium Battery Technology Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-01-20
Anticipated expiration: 2032-10-14

Abstract

The utility model provides a subassembly and electronic box are kept apart to pencil, the subassembly is kept apart to the pencil includes: the baffle plate is provided with a plurality of weakening grooves along the length direction; the two side plates are respectively connected to the two side parts in the width direction of the partition plate; wherein, baffle, curb plate enclose into a guiding gutter. When the relief valve of battery just begins to open, gas jet is not very violent, the combustion gas can be derived through the guiding gutter earlier, when the battery spouts the valve most violent, gas temperature is the highest promptly, when gas emission is the biggest, because the baffle is thinnest weakening the thickness of groove department, weaken the groove and melt at first and wear, with the direct discharge electronic box of gas, the pencil of battery is outside the guiding gutter, a small amount of gas continues to discharge along the guiding gutter, also can't stretch to the pencil in the outside and the internal circuit of electronic box, gas discharge whole in-process, gas can not contact with the pencil, thereby prevent the short circuit and strike sparks and initiate electronic box burning scheduling problem, the security of electronic box has been improved.

Description

Wire harness isolation assembly and electric box

Technical Field

The utility model relates to a battery field, in particular to pencil isolation assembly and electronic box.

Background

The thermal runaway characteristic of the battery is researched in the text of lithium iron phosphate and thermal runaway characteristic of the ternary lithium battery under the external overheat condition, through research, the stages of safety valve opening, ignition, spraying and the like can be found when the ternary lithium battery is in thermal runaway, and the lithium iron phosphate battery cannot spontaneously combust under the condition of no external ignition and only the safety valve is opened. Meanwhile, the heat required by the unit area of the lithium iron phosphate is far higher than that of the ternary lithium battery, so that the thermal runaway of adjacent batteries cannot be caused when only the safety valve of the single battery cell is opened. Therefore, most of the current mainstream lithium battery energy storage systems adopt lithium iron phosphate batteries, and how to prevent the external ignition condition when the lithium iron phosphate batteries are out of control due to heat is a key point. In the absence of an external fire source, the plastic will only melt and not burn, and therefore, the analysis shows that the main reason for the occurrence of the external ignition condition is the short circuit of the electric box circuit, namely the sampling line or the high-voltage circuit loop. And the battery busbar distance is far away apart in the module, is difficult to take place the return circuit, and what the most easy short circuit is the sampling circuit, if the design is improper, high temperature gas melts sampling pencil insulating layer and leads to it to take place the short circuit when the relief valve is opened, produces and strikes sparks to cause the battery to strike sparks.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a pencil isolation component and electronic box in order to overcome the defect that prior art battery was on fire easily.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a wire harness isolation assembly, comprising:

the baffle plate is provided with a plurality of weakening grooves along the length direction;

the two side plates are respectively connected to the two side parts in the width direction of the partition plate;

wherein, baffle, curb plate enclose into a guiding gutter.

In this scheme, when the relief valve of battery just begins to open, gas jet is not very violent, the combustion gas can be derived through the guiding gutter earlier, when the battery spouts the valve most violent, gas temperature is the highest promptly, when gas emission is the biggest, because the baffle is thinnest weakening the thickness of groove department, weaken the groove and melt at first and wear, with gaseous direct discharge electronic box, the pencil of battery is outside the guiding gutter, a small amount of gas continues to discharge along the guiding gutter, also can't stretch to the pencil in the outside and the inner circuit of electronic box, gas discharge whole in-process, gas can not contact with the pencil, thereby prevent that the short circuit from striking sparks and arousing electronic box burning scheduling problem, the security of electronic box has been improved. In particular, the weakening groove may be a groove provided on a side of the partition plate facing the baffle groove. In addition, this pencil isolation component wholly is long tubular shape, compares flat pencil division board among the prior art, and the volume reduces greatly to reduce cost.

Preferably, the outside of both sides of the width direction of the partition board is respectively provided with a baffle, and a wiring groove is formed between the baffle and the adjacent side board.

In this scheme, the pencil is arranged at the trough inslot, keeps apart with the guiding gutter, reduces the possibility of short circuit, and the pencil is located the lateral part of guiding gutter moreover, separates with weakening the groove, prevents that high-temperature gas from directly impacting the pencil.

Preferably, the wire harness isolation assembly further comprises an installation part for installing a busbar, and the installation part is located on one side, away from the wiring duct, of the baffle plate.

In this scheme, the pencil and the busbar of baffle in with the trough separate, further reduce the possibility of short circuit, improve the security.

Preferably, one end of the diversion trench is closed, the other end of the diversion trench is communicated with the outside, and a wiring harness collection port is arranged outside the closed end of the diversion trench.

In this scheme, guiding gutter one end opening, one end seal, and battery exhaust high temperature gas is discharged from guiding gutter open-ended one end, and the outside of guiding gutter confined one end is used for installing the pencil and collects the interface to guarantee the safety of pencil. At the final stage of the cell degassing, the remaining gas is discharged from one end of the opening along the guide groove.

Preferably, the baffle is provided with a plurality of wire harness grooves.

In this scheme, the pencil in the trough passes through the pencil groove and is connected to the busbar.

Preferably, one side of the side plate, which is far away from the partition plate, is provided with a sealing strip.

In this scheme, the sealing strip is used for the sealed between curb plate and the battery, prevents that high-temperature gas from leaking from the guiding gutter in, prevents that the pencil from taking place the short circuit.

Preferably, one side of the partition board facing the diversion trench and one side of the side board facing the diversion trench are covered with high temperature resistant layers, and the high temperature resistant layers avoid the weakening trench.

In this scheme, high temperature resistant layer plays the guard action to baffle and curb plate, because high temperature resistant layer avoids weakening the groove, consequently weakens groove department and does not resist high temperature relatively, is melted at first and wears, and high-temperature gas can follow this time and discharge. The high temperature resistant layer can be high temperature resistant ceramic, fluororubber and the like.

An electrical box comprising batteries arranged in at least one row, wherein each row of batteries is provided with a corresponding wire harness isolation assembly, and safety valves of the batteries in the same row are communicated with the same diversion trench and are arranged corresponding to weakening grooves of a partition plate.

In this scheme, be provided with one or multiseriate battery in the electronic box, every battery all corresponds and sets up pencil isolation component, the guiding gutter is detained and is formed a diversion channel on the battery, when the relief valve of a battery begins to exhaust, gas can be earlier derived through the guiding gutter (be guiding channel), when the battery spouts the valve most fiercely, gas temperature is the highest promptly, when gas emission is the biggest, weaken groove department and take place to melt and wear, with gaseous direct discharge electronic box, the pencil of battery is outside the guiding gutter, the whole in-process of gas emission, gas can not contact with the pencil, thereby prevent that the short circuit from striking sparks and cause electronic box burning scheduling problem, the security of electronic box has been improved.

Preferably, the electronic box further comprises a protective cover, and the protective cover covers the partition plate on the outer side of the diversion trench.

In this scheme, after the battery exhaust breaks through and weakens the groove, the exhaust can further destroy the visor, and the exhaust is discharged outside the electronic box. And because the protective cover only can damage a part near the weakening groove and fall to the conductive substance of the electric box after being sprayed out, most of the conductive substance can be blocked outside the electric box by the protective box, and the possibility of short circuit of the circuit in the electric box is reduced. Preferably, the protective cover is a low melting point material, for example, the protective cover may be plastic.

Preferably, a support column is arranged between the protective cover and the wire harness isolation assembly, and the support column is higher than a bus bar connected to the wire harness isolation assembly.

In this scheme, the support column prevents that the visor from directly pressing on the busbar to play the effect of further protection.

On the basis of meeting the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: the utility model discloses an in the electronic box was used to the pencil isolation subassembly, when the relief valve of battery just started to open, gas jet is not too violent, the combustion gas can be derived through the guiding gutter earlier, when the battery spouts the valve most violent, gas temperature is the highest promptly, when gas emission is the biggest, because the baffle is thinnest weakening the thickness of groove department, weaken the groove and melt at first and wear, with gaseous direct discharge electronic box, the pencil of battery is outside the guiding gutter, a small amount of gas continues to discharge along the guiding gutter, also can't stretch the pencil in the outside and the internal circuit of electronic box, gas discharge whole in-process, gas can not contact with the pencil, thereby prevent that short circuit from striking sparks and cause electronic box burning scheduling problem, the security of electronic box has been improved.

Drawings

Fig. 1 is a schematic structural diagram of an electrical box according to an embodiment of the present invention.

Fig. 2 is an exploded schematic view of an electrical box according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a wiring harness isolation assembly according to an embodiment of the present invention installed on a row of batteries.

Fig. 4 is a schematic partial structural view of a wire harness isolation assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a wire harness isolation assembly according to an embodiment of the present invention.

Fig. 6 is a schematic view of an internal structure of an electrical box according to an embodiment of the present invention.

Fig. 7 is a partially enlarged schematic view at a of fig. 6.

Description of the reference numerals

Panel assembly 100

Battery 200

Harness isolation assembly 300

Lower case 400

Case cover 500

End plate 600

Protective cap 700

Maintenance panel 800

Battery module 900

Partition board 1

Weakening groove 11

Side plate 2

Sealing strip 21

Guiding gutter 3

Baffle 4

Wire harness slot 41

Wiring groove 5

Mounting part 6

Connecting hole 61

Bus bar 7

Battery bus bar 71

Output very hard bar 72

Bump 8

Mounting hole 81

Rivet 82

Support column 9

Through hole 91

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present embodiment provides an electrical box, which has a lower box body 400 and a box cover 500, and at least one row of batteries 200 is disposed in an outer casing, specifically, as shown in fig. 1, four rows of batteries 200 are disposed in the electrical box of the present embodiment, and each row of batteries 200 constitutes a battery module 900. In other embodiments, the number of the battery modules 900 may be other, and may be arbitrarily selected by those skilled in the art.

The four rows of battery modules 900 are mounted on the lower case 400 by bolts or bonding, etc., and the cover 500, the panel assembly 100, and the internal circuit are also fixed on the lower case 400 by bolts or bonding, etc., wherein the panel assembly 100 and the cover 500 may also be connected by bolts, and finally the maintenance panel 800 is mounted on the cover 500 by bolts. In the battery module 900, the batteries 200 are connected one by one and finally clamped by the both-side end plates 600.

In the present embodiment, as shown in fig. 1 to 4, each column of batteries 200 is provided with a harness isolation assembly 300, the harness isolation assembly 300 includes a partition board 1 and two side boards 2, the partition board 1 is provided with a plurality of weakening grooves 11 along the length direction, as can be seen from fig. 5 and 7, the weakening grooves 11 are not through grooves, and at the positions of the weakening grooves 11, the thickness of the partition board 1 is relatively thin, and the partition board is easily melted through under high temperature conditions. The two side plates 2 are respectively connected with the two side parts of the partition board 1 in the width direction; wherein, baffle 1, curb plate 2 enclose into a guiding gutter 3. The guiding groove 3 is buckled on the battery 200 to form a guiding channel.

Referring to fig. 3, a double-arrow line a indicates a length direction of the separator 1, i.e., an extending direction of the separator 1. The double arrow line B indicates the width direction of the partition board 1.

Arrows in fig. 7 show the exhaust flow path of the battery 200, when the safety valve of the battery 200 is just opened, gas injection is not very intense, the discharged gas can be firstly discharged through the diversion trench 3, when the spray valve of the battery 200 is most intense, namely, the temperature of the sprayed substance of the safety valve is highest and the discharge amount is largest, because the thickness of the partition plate 1 at the weakening trench 11 is thinnest and the high-temperature gas impact facing the safety valve is right, the partition plate 1 is firstly melted through at the position where the weakening trench 11 is arranged, the gas is directly discharged out of the electric box, the wiring harness of the battery 200 is outside the diversion trench 3, a small part of the gas discharged by the safety valve is continuously discharged along the diversion trench 3 and cannot spread to the outside wiring harness and the internal circuit of the electric box, and in the whole gas discharge process, the gas cannot contact with the wiring harness, so that the problems of electric box combustion caused by short circuit ignition are prevented, and the safety of the electric box is improved. In particular, referring to fig. 5 and 7, the weakening groove 11 may be a groove provided on the side of the partition board 1 facing the baffle groove 3, and as an alternative embodiment, the weakening groove 11 may also be provided on the side facing away from the baffle groove 3. In addition, the wire harness isolation assembly 300 is integrally in a long tubular shape, so that compared with a flat wire harness isolation plate in the prior art, the volume is greatly reduced, and the cost is reduced. In the present embodiment, the partition board 1 and the side board 2 are of an integral structure.

Referring to fig. 4 and 5, baffle plates 4 are respectively arranged outside two sides of the partition board 1 in the width direction, and a wiring groove 5 is formed between each baffle plate 4 and the adjacent side board 2. The pencil is arranged in trough 5, keeps apart with guiding gutter 3, reduces the possibility of short circuit, and the pencil is located the lateral part of guiding gutter 3 moreover, separates with weakening groove 11, prevents that high-temperature gas from directly impacting the pencil.

One side of the side plate 2, which is far away from the partition plate 1, is provided with a sealing strip 21, and the sealing strip 21 is used for sealing between the side plate 2 and the battery 200, solving the height tolerance of the battery 200, sealing the contact surface between the flow guide channel and the battery 200, preventing high-temperature gas from leaking from the flow guide groove 3, and preventing a wiring harness from short-circuiting.

The harness isolation assembly 300 further comprises a mounting portion 6 for mounting the busbar 7, the mounting portion 6 being located on a side of the baffle 4 remote from the raceway 5. The baffle 4 separates the wiring harness in the wiring duct 5 from the bus bar 7, so that the possibility of short circuit is further reduced, and the safety is improved. Specifically, the bus bar 7 may be fixed to the battery 200 by welding, the mounting portion 6 is provided with the connection hole 61, and the bus bar 7 is fixed to the mounting portion 6 by caulking. The busbar 7 may specifically include a battery busbar 71 and an output very hard bar 72.

The baffle 4 is provided with a plurality of harness slots 41, and the harnesses in the cabling slots 5 are connected to the bus bar 7 through the harness slots 41.

Referring to fig. 6 and 7, one end of the diversion trench 3 is closed, the other end of the diversion trench is communicated with the outside, and a wiring harness collection port is arranged outside the closed end of the diversion trench 3. One end of the diversion trench 3 in the length direction is open, the other end is closed, high-temperature gas exhausted from the battery 200 is exhausted from the open end of the diversion trench 3, and the outside of the closed end of the diversion trench 3 is used for installing a wiring harness collection interface so as to ensure the safety of the wiring harness. At the final stage of the exhaust of the battery 200, the remaining gas is discharged from one end of the opening along the guide groove 3.

In a preferred embodiment, the partition board 1 and the side board 2 facing the diversion trench 3 are covered with a high temperature resistant layer, and the high temperature resistant layer avoids the weakening groove 11. The high temperature resistant layer plays the guard action to baffle 1 and curb plate 2, because high temperature resistant layer avoids weakening groove 11, consequently weakens groove 11 department and does not resist high temperature relatively, is melted at first and wears, and high-temperature gas can be followed this time and discharged. The high temperature resistant layer can be high temperature resistant ceramic, fluororubber and the like.

Each row of batteries 200 is correspondingly provided with a harness isolation assembly 300, and the safety valves of the batteries 200 in the same row are communicated with the same diversion trench 3 and are correspondingly arranged with the weakening groove 11 of the partition board 1.

Be provided with one or multiseriate battery 200 in the electronic box of this embodiment, every battery 200 all corresponds and sets up pencil isolation assembly 300, when the relief valve of a battery 200 begins to exhaust, gas can be derived through guiding gutter 3 earlier, when battery 200 spouts the valve most fiercely, gas temperature is the highest promptly, when gas emission is the biggest, weaken groove 11 department and take place to melt and wear, with gaseous direct discharge electronic box, battery 200's pencil is outside guiding gutter 3, gas emission whole in-process, gas can not contact with the pencil, thereby prevent that the short circuit from striking sparks and cause electronic box burning scheduling problem, the security of electronic box has been improved.

The electric box further comprises a protective cover 700, and the protective cover 700 covers the partition board 1 at the outer side of the diversion trench 3. After the battery 200 is exhausted through the weakening groove 11, the protective cover 700 is further damaged by the exhaust, and the exhaust is exhausted out of the electrical box. In addition, since the protective cover 700 only partially damages the vicinity of the weakening groove 11 and the conductive material which falls to the electric box after being sprayed out is mostly blocked outside the electric box by the protective box, the possibility of short circuit of the circuit in the electric box is reduced. Preferably, the protective cover 700 is a low melting point material, for example, the protective cover 700 may be plastic. The protective cover 700 may be attached to the harness isolation assembly 300 by rivets 82. The wire harness isolation assembly 300 includes a projection 8 projecting to the side, and the projection 8 is provided with a mounting hole 81 through which the rivet 82 passes.

A support post 9 is provided between the protective cover 700 and the wire harness isolation member 300, and the support post 9 is higher than the bus bar 7 connected to the wire harness isolation member 300. The support posts 9 prevent the protective cover 700 from pressing directly on the busbar 7, thereby providing further protection. The support post 9 may be disposed on the boss 8, the support post 9 having a through hole 91 corresponding to the mounting hole 81, and the rivet 82 sequentially passing through the through hole 91 of the support post 9 and the mounting hole 81 of the boss 8.

In the description of the present invention, the terms "upper", "lower", "front", "rear", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and do not indicate or imply the specific installation and operation orientations that the described devices or elements must have, and therefore, should not be construed as limiting the present invention.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments can be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A wire harness isolation assembly, comprising:

the two side plates are respectively connected to the two side parts of the partition board in the width direction;

wherein, a diversion trench is enclosed by the clapboard and the side plate.

2. The wire harness insulation assembly according to claim 1, wherein a baffle plate is provided on each of outer sides in a width direction of the partition plate, and a wiring groove is formed between the baffle plate and the adjacent side plate.

3. The wire harness insulating assembly according to claim 2, further comprising a mounting portion for mounting a bus bar, the mounting portion being located on a side of the baffle plate remote from the wiring trough.

4. The wire harness isolation assembly of claim 1, wherein the diversion trench is closed at one end and communicates with the outside at the other end, and a wire harness collection port is disposed outside the closed end of the diversion trench.

5. The wire harness spacer assembly of claim 2, wherein the retainer defines a plurality of wire harness slots.

6. The wire harness spacer assembly of claim 1, wherein a side of the side plate remote from the bulkhead is provided with a seal strip.

7. The wire harness insulating assembly according to claim 1, wherein a side of the partition plate facing the blast groove and a side of the side plate facing the blast groove are coated with a high temperature resistant layer, and the high temperature resistant layer avoids the weakening groove.

8. An electric box characterized in that it comprises batteries arranged in at least one row, the batteries of each row being provided with a harness isolation assembly according to any one of claims 1 to 7, and safety valves of the batteries of the same row being communicated with the same guide groove and being provided in correspondence with the weakening groove of the partition.

9. The electrical box of claim 8, further comprising a protective cover covering the partition outside the channels.

10. The electrical box of claim 9, wherein a support post is disposed between the protective cover and the wire harness isolation assembly, the support post being higher than a bus bar connected to the wire harness isolation assembly.