CN218827688U - Wire harness isolation plate, battery module and electric device - Google Patents

Abstract

The application relates to new energy battery technical field provides a pencil division board, battery module and power consumption device, and wherein, the pencil division board includes: the pressure relief device comprises a partition board body, a pressure relief channel and a pressure relief valve, wherein the pressure relief channel is arranged along the length direction of the partition board body, and at least one end of the pressure relief channel is provided with an opening; and the plurality of pressure relief ports are positioned on one side of the isolation plate body and are communicated with the pressure relief channel. Through the technical scheme of this application, can improve the security performance of battery module.

Description

Wiring harness isolation plate, battery module and electric device

Technical Field

The application relates to the technical field of new energy batteries, in particular to a wiring harness isolation plate, a battery module and an electric device.

Background

With the promotion of the demand of various industries on new energy industries and the increasing maturity of new energy technologies, new energy batteries are applied to various industries, such as passenger cars, buses, logistics vehicles, buses, energy storage systems and the like.

Among the prior art, the power battery module does not set up fixed pressure release passageway, and when the thermal runaway problem appeared in the electric core in the battery module, the high temperature high-pressure gas that the electric core jetted can cause the damage to other parts in the battery module to influence the security performance of battery module.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a pencil division board, battery module and electric device, can improve the security performance of battery module.

In a first aspect, the present application provides a wire harness spacer, including: the pressure relief device comprises a partition board body, a pressure relief channel and a pressure relief valve, wherein the pressure relief channel is arranged along the length direction of the partition board body, and at least one end of the pressure relief channel is provided with an opening; and the plurality of pressure relief ports are positioned on one side of the isolation plate body and are communicated with the pressure relief channel.

In one embodiment, the pressure relief opening is formed by gradually reducing the cross-sectional area from one end far away from the pressure relief channel to the other end.

In one embodiment, the isolation plate body is further provided with a plurality of through holes for accommodating bus bars.

As an implementation mode, a groove used for installing an FPC is further formed in one side, away from the pressure relief opening, of the isolation board body, and the groove is located between the through hole and the pressure relief channel.

In one embodiment, each pressure relief opening is provided with an explosion-proof membrane.

In one embodiment, the isolation plate body is made of a high temperature resistant and insulating material.

In a second aspect, the present application introduces a battery module, including the harness isolation plate of the first aspect; the battery module comprises a battery module body and a battery module, wherein the battery module body comprises a plurality of battery cores, the battery cores are stacked along the length direction of the battery module body and extend along the width direction of the battery module body, and one end of each battery core along the width direction of the battery module body is provided with an explosion-proof valve; the both ends of electric core subassembly width direction respectively are equipped with a division board body respectively, just the same one end of electric core subassembly is a plurality of explosion-proof valve homogeneous one on the electricity core corresponds a plurality of pressure release mouthful settings towards corresponding one end.

In one embodiment, the size of the pressure relief port is larger than the size of the explosion-proof valve.

As an embodiment, the separator further comprises a bus bar integrally formed with the separator body; the busbar still includes the laminating section, the laminating section with the electrode terminal electricity of electricity core is connected, the laminating section is located the through-hole.

In a third aspect, the present application provides an electric device including the battery module according to the second aspect.

The technical scheme of the application has the following effects:

1. the length direction along the division board body on the division board body is equipped with the pressure release passageway, pressure release passageway's at least one end is equipped with the opening, and one side of division board body still has a plurality of pressure release mouths, the pressure release mouth is linked together with pressure release passageway, when the division board body is used in battery module, it installs in the one end that has the explosion-proof valve of electric core, when electric core takes place the thermal runaway problem, the high temperature high-pressure gas of its transmission passes through the pressure release mouth and discharges to pressure release passageway, the outside of battery module is discharged by pressure release passageway again, avoid high temperature high-pressure gas to cause the damage to other parts in the battery module, thereby improve battery module's security performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application 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 that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a partial explosion structure at a viewing angle of a battery module according to an embodiment of the present disclosure;

fig. 3 is a schematic view of a partial explosion structure at another view angle of the battery module according to the embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a top view of a battery module according to an embodiment of the present disclosure;

FIG. 5 isbase:Sub>A schematic sectional view taken along line A-A in FIG. 4;

fig. 6 is an enlarged view of a portion a of fig. 4.

Icon: 1-a separator body; 11-a pressure relief port; 12-a pressure relief channel; 13-a through hole; 14-a groove; 15-opening; 2-electric core; 21-an explosion-proof valve; 22-an electrode terminal; 3-a busbar; 31-a connecting segment; 32-a fitting section; 4-liquid cooling plate; 5-FPC; 6-end plate; 7-output pole piece.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments 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 or explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 2, 3 and 5, in a first aspect, the present application is directed to a wire harness insulating plate, including: isolator body 1, length direction along isolator body 1 is equipped with pressure release channel 12, pressure release channel 12 is inside hollow cavity structure, its at least one end is equipped with opening 15, can be with the high temperature high-pressure gas exhaust battery module that 2 thermal runaway of electric core sprayed outside, and one side of isolator body 1 still is equipped with a plurality of pressure release mouths 11, each pressure release mouth 11 all is linked together with pressure release channel 12, pressure release mouth 11 is arranged in guiding high temperature high-pressure gas to enter into pressure release channel 12.

As shown in fig. 2, optionally, an opening 15 may be provided at one end of the pressure relief channel 12, and of course, both ends may also be provided with openings 15 at the same time, which is a preferred embodiment, and this application provides an opening 15 at one end of the pressure relief channel 12.

In the prior art, a wire harness is arranged on a wire harness isolation plate for low-voltage sampling, the wire harness isolation plate only plays an insulating role and has a single function, a pressure relief channel 12 is arranged in an isolation plate body 1, and meanwhile, a plurality of pressure relief openings 11 are formed in one side of the isolation plate body 1, so that the using function of the wire harness isolation plate is increased; on the other hand, when the pencil division board was installed in the battery module, can guide the high temperature high-pressure gas that electric core 2 jetted when thermal runaway to the battery module outside, improve the security performance of battery module.

Optionally, in order to ensure the insulation and safety of the isolation board body 1, the isolation board body 1 is made of a high-temperature-resistant and insulation-resistant material, such as an epoxy resin composite material or a mica sheet composite material; because among the prior art, for injection moulding, the pencil division board adopts flame retardant such as PP PA relatively lower, the better material of mobility, when the extreme condition such as electric core 2 thermal runaway appearing, division board body 1 burns easily, can't play the effect of protection FPC 5.

In addition, in order to avoid insulation failure caused by phenomena of volatilization, corrosion, defect and the like of the material due to cold and hot shrinkage, the water absorption rate of the material is required to be less than 0.1 percent. Meanwhile, in order to ensure the structural performance of the isolation plate body 1, the isolation plate body 1 needs to be designed with structural strength, the thickness of the isolation plate body is 2-5mm, and the isolation plate body 1 is prevented from being broken by high-temperature and high-pressure gas when the battery cell 2 has a thermal runaway problem.

Optionally, the isolation plate body 1 is a sheet structure.

As an embodiment, pressure relief vent 11 is by keeping away from the one end of pressure relief passageway 12 towards the cross-sectional area of the other end and diminishing gradually the setting for pressure relief vent 11 is round platform type structure, and its cross-sectional area of keeping away from the one end of pressure relief passageway 12 is the biggest, and the one end area that is linked together with pressure relief passageway 12 is the smallest, increases the admission pressure, thereby make pressure relief vent 11 can guide more high temperature high-pressure gas to pressure relief passageway 12 in, improve the efficiency of admitting air, thereby further improve battery module's power consumption safety.

As shown in fig. 2 and 3, as an embodiment, the separator body 1 is further provided with a plurality of through holes 13, the through holes 13 are used for accommodating the bus bars 3, so that the bus bars 3 are electrically connected with the electrode terminals 22 of the battery cells 2, and the through holes 13 are provided to provide stable support for the bus bars 3.

Optionally, a plurality of through holes 13 are arranged near the top end of the isolation plate body 1, and are arranged at uniform intervals along the length direction of the isolation plate body 1, two through holes 13 at two ends of one isolation plate body 1 at one end of the battery module are respectively used for installing high-voltage aluminum bars, two high-voltage aluminum bars are respectively connected with an output pole integrated piece 7 connected with external high-voltage electricity and an output pole integrated piece 7 connected with external low-voltage electricity, the rest two adjacent through holes 13 are used for installing a bus bar 3, and the two adjacent through holes 13 on the isolation plate body 1 at the other end are used for installing a bus bar 3.

As shown in fig. 1, as an embodiment, a side of the isolation board body 1 away from the pressure relief opening 11 is provided with a Flexible Printed Circuit (FPC) 5, a groove 14 is disposed between the through hole 13 and the pressure relief channel 12, when the FPC5 is mounted in the groove 14 and the bus bar 3 is mounted in the through hole 13, the FPC5 and the bus bar 3 are spaced in a vertical direction, and the groove 14 can make the FPC5 and the bus bar 3 avoid each other, so as to prevent the FPC5 from contacting the bus bar 3 and causing short Circuit of the battery module; meanwhile, the interference of electromagnetism to the FPC5 can be avoided, the safety of the battery module is further improved, in addition, when thermal failure occurs, the pressure relief channel 12 and the groove 14 are arranged at intervals, the groove 14 can protect the FPC5, and normal data transmission of the FPC5 and BMS alarm strategy implementation cannot be influenced.

As an implementation mode, each pressure relief opening 11 is provided with an explosion-proof membrane, and by providing the explosion-proof membrane, when the electrical core 2 is out of control due to heat, the high-temperature and high-pressure gas injected by the electrical core can correspondingly burst the explosion-proof membrane, so that the high-temperature and high-pressure gas enters the pressure relief channel 12 through the pressure relief opening 11, and flows out of the battery module through the pressure relief channel 12. If not set up the rupture membrane, then when electric core 2 takes place thermal runaway, its high temperature high pressure gas that sprays gets into pressure release channel 12 by the pressure release mouth 11 that corresponds after, some high temperature high pressure gas can be sprayed to the explosion-proof valve 21 of corresponding electric core 2 by remaining pressure release mouth 11, can cause the influence to other electric cores 2.

Optionally, the bursting pressure of the bursting disc is less than or equal to 40kPa, and the area of the bursting disc can be optimized by combining the actual sizes of the explosion-proof valve 21 of the battery cell 2 and the liquid injection hole.

As shown in fig. 1 to 3, in a second aspect, an embodiment of the present application introduces a battery module including the wiring harness separator described in the first aspect; the battery module further comprises a battery core assembly, the battery core assembly comprises a plurality of battery cores 2, the plurality of battery cores 2 are stacked along the length direction of the battery module and extend along the width direction of the battery module, an explosion-proof valve 21 is arranged at one end of each battery core 2 along the extending direction of the battery core 2, and the explosion-proof valve 21 has the functions of explosion prevention and explosion damage reduction and is waterproof and breathable; one side that the pencil division board has pressure release mouth 11 has the one end setting of explosion-proof valve 21 towards electric core 2, make a plurality of explosion-proof valves 21 on a plurality of electric cores 2 of the same end of electric core subassembly all corresponding with a plurality of pressure release mouths 11 on the division board body 1 that corresponds one end, when the problem of thermal runaway appears in a certain electric core 2, can break through the rupture membrane on the pressure release mouth 11 that corresponds, its jetted high temperature high-pressure gas enters into to pressure release channel 12 in by pressure release mouth 11, and discharge to the battery module outside, improve the security of battery module, and simultaneously, the rupture membrane that is not broken through can protect electric core 2 of corresponding end, thereby further improve the power consumption safety of battery module.

Optionally, battery module's width direction's both ends respectively are equipped with a division board body 1, and simultaneously, the connected mode of a plurality of electric cores 2 in the electric core subassembly is the tandem system in this application, consequently, two adjacent electric cores 2's explosion-proof valve 21 orientation direction sets up for opposite, of course, according to actual need, electric cores 2's connection can also be parallelly connected or cluster, the mode of parallelly connected etc, different connected modes, lead to electric cores 2's the mode of arranging, then explosion-proof valve 21's orientation direction is also different, the interval between two adjacent pressure release mouths 11 is also different on division board body 1, this application does not specifically prescribe a limit to this.

Optionally, the interval between two adjacent pressure relief openings 11 on the division board body 1 is equal to the interval between two adjacent explosion-proof valves 21 at the same end of the cell assembly, so that a plurality of explosion-proof valves 21 at the same end of the cell assembly are all arranged towards the pressure relief openings 11 at the corresponding end, and high-temperature and high-pressure gas is prevented from being injected to the periphery of the pressure relief openings 11.

As an implementation mode, the size of the pressure relief opening 11 is larger than that of the explosion-proof valve 21, and a certain gap is formed between the battery cell 2 and the isolation plate body 1, so that the size of the pressure relief opening 11 is designed to be larger than that of the explosion-proof valve 21, and thus, when the high-temperature and high-pressure gas is injected from the pressure relief opening 11, the pressure relief opening 11 can guide all the high-temperature and high-pressure gas into the pressure relief channel 12, so that the high-temperature and high-pressure gas can be prevented from being injected to the outside of the pressure relief opening 11, and the power utilization safety of the battery module is improved.

As shown in fig. 5 and 6, as an embodiment, the battery module further includes the bus bar 3, and the bus bar 3 is integrally formed with the partition body 1, so that the assembly steps of the battery modules during grouping can be reduced, and the labor cost can also be reduced; the busbar 3 comprises two attaching sections 32 and a connecting section 31, the two attaching sections 32 are respectively positioned at two ends of the connecting section 31 and fixedly connected with the connecting section 31, the two attaching sections 32 are respectively positioned in two adjacent through holes 13 of the isolation plate body 1, and the connecting section 31 is arranged in a protruding manner towards a gap between two adjacent electrode terminals 22, so that when the attaching sections 32 are attached and connected with the electrode terminals 22, the height difference of the electric core 2 can be absorbed, and the welding performance is ensured; on the other hand, the connection section 31 can be prevented from interfering with peripheral objects when the battery module vibrates, thereby improving the safety of the battery module.

As an implementation mode, the battery module further includes an FPC5, the FPC5 is installed in the groove 14, the FPC5 is connected with the bus bar 3 through a plurality of conductive sheets, and the conductive sheets are used for sampling the voltage signal of the electric core 2. The groove 14 separates the FPC5 from the bus bar 3, so that the contact between the FPC5 and the bus bar 3 is avoided, the short circuit of the battery module is avoided, meanwhile, the electromagnetic interference is avoided, and the safety of the whole battery module is improved.

In addition, FPC5 sets up with busbar 3 at vertical direction interval, improves FPC5 and busbar 3's interval distance, effectively keeps apart electrical interference.

As shown in fig. 1, as an embodiment, the battery module further includes two output pole integrated members 7, the two output pole integrated members are respectively located at two ends of the battery module in the length direction and are respectively electrically connected to the bus bars 3 on the isolation plate body 1 at the same end of the electric core assembly, one of the output pole integrated members 7 is electrically connected to an external high voltage, the other one is electrically connected to an external low voltage, meanwhile, two electric cores 2 located at the end of the electric core assembly are respectively electrically connected to the output pole integrated member 7 at the corresponding end, and the rest of the electric cores 2 are electrically connected through the bus bars 3, thereby realizing a closed loop of the battery module.

Of course, the mounting position of the output pole piece 7 can be adjusted according to the serial and parallel connection mode of the battery cell 2, and the application is not specifically limited.

Wherein, the opening 15 orientation of pressure release channel 12 sets up in the one end of exporting utmost point integrative 7 and outside low pressure electrical connection, and when electric core 2 thermal runaway problem appeared, high temperature high-pressure gas can avoid causing secondary damage to outside high pressure electrical connection's one end, further improves the security of battery module.

Optionally, the battery module still includes two end plates 6, and one of them end plate 6's both ends link to each other with the one end of two division board bodies 1 respectively, and the both ends of another end plate 6 link to each other with the other end of two end plates 6 respectively to enclose the accommodation space who holds the electric core subassembly. The two output pole integrated pieces 7 are respectively and correspondingly arranged on the two end plates 6 and fixedly connected with the end plates 6 through bolts.

Optionally, the battery module includes two division board bodies 1, and two division board bodies 1 set up relatively, are located the width direction's of electric core subassembly both ends respectively, and in order to avoid high-pressure high temperature's gas to cause the injury to outside high pressure, the pressure release passageway 12 of this application sets up an opening 15, and the other end is the shutoff state, and opening 15 is located the one end of being connected with outside low pressure, and of course, the both ends of pressure release passageway 12 also can set up opening 15.

Optionally, set gradually insulation board and heat preservation cotton between end plate 6 and the electric core subassembly, set up the insulation effect that the insulation board can the electric core subassembly, the heat preservation cotton then mainly plays thermal-insulated and absorption inflation's effect, wherein, the heat preservation cotton adopts the subgrain ceramic nanofiber material, and thermal-insulated temperature is up to 1300 ℃.

As shown in fig. 1, as an embodiment, the battery module further includes a liquid cooling plate assembly, the liquid cooling plate assembly includes two liquid cooling plates 4, the two liquid cooling plates 4 are respectively located at the upper and lower ends of the battery module, and are welded to the end plates 6 at the two ends in a wrapping manner, so as to improve the structural strength of the battery module. An insulating heat conducting pad is arranged between the upper end surface and the lower end surface of the electric core assembly and the liquid cooling plate 4 at the corresponding end, the insulating heat conducting pad can conduct heat, and meanwhile, the flame retardant effect can be achieved, so that the safety of the battery module is further improved; in addition, the side of the liquid cooling plate 4 facing the electric core assembly is also coated with insulating and heat conducting materials.

Optionally, the liquid cooling plate 4 is provided with a water inlet and a water outlet, wherein the water inlet and the water outlet are both communicated with four flow channels in the liquid cooling plate 4, so as to provide a uniform and high-heat-capacity heat transfer path, the temperature of the battery cell 2 can be accurately controlled from the original maximum temperature of 48 ℃ to 35 ℃, and the temperature difference can be accurately controlled from the original maximum temperature of 15 ℃ to 3 ℃.

In a third aspect, an embodiment of the present application provides an electric device, where the electric device includes the battery module described in the second aspect, where the battery module provides electric energy for the electric device, and the electric device may be an automobile or a ship.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application 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.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. A wire harness spacer, comprising:

the pressure relief device comprises a partition board body, wherein a pressure relief channel is arranged along the length direction of the partition board body, and at least one end of the pressure relief channel is provided with an opening;

and the plurality of pressure relief ports are positioned on one side of the isolation plate body and are communicated with the pressure relief channel.

2. The wire harness isolation plate according to claim 1, wherein the pressure relief port is provided such that a cross-sectional area thereof becomes gradually smaller from one end away from the pressure relief channel toward the other end.

3. The wire harness insulation panel according to claim 2, wherein the insulation panel body is further provided with a plurality of through holes for receiving bus bars.

4. The wire harness isolation board as claimed in claim 3, wherein a groove for mounting an FPC is further provided on a side of the isolation board body facing away from the pressure relief opening, and the groove is located between the through hole and the pressure relief channel.

5. The wire harness isolation board according to any one of claims 1 to 4, wherein each of the pressure relief ports is provided with an explosion-proof membrane at a position.

6. The wire harness insulation panel according to any one of claims 1 to 4, wherein the insulation panel body is made of a high temperature resistant, insulating material.

7. A battery module characterized by comprising the harness separator according to any one of claims 1 to 6;

the battery module comprises a battery module body and a battery module, wherein the battery module body comprises a plurality of battery cores, the battery cores are stacked along the length direction of the battery module body and extend along the width direction of the battery module body, and one end of each battery core along the width direction of the battery module body is provided with an explosion-proof valve;

the both ends of electric core subassembly width direction respectively are equipped with a division board body respectively, just it is a plurality of with the one end electric core subassembly explosion-proof valve homogeneous one on the electricity core corresponds a plurality of pressure release mouthful settings of orientation corresponding one end.

8. The battery module according to claim 7, wherein the size of the pressure relief port is larger than the size of the explosion-proof valve.

9. The battery module according to claim 8, further comprising a bus bar integrally formed with the separator body;

the busbar still includes the laminating section, the laminating section with the electrode terminal electricity of electricity core is connected, the laminating section is located the through-hole.

10. An electric device, characterized by comprising the battery module according to any one of claims 7 to 9.

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