CN219498639U - Distribution box, battery pack and vehicle - Google Patents
Distribution box, battery pack and vehicle Download PDFInfo
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- CN219498639U CN219498639U CN202320354988.6U CN202320354988U CN219498639U CN 219498639 U CN219498639 U CN 219498639U CN 202320354988 U CN202320354988 U CN 202320354988U CN 219498639 U CN219498639 U CN 219498639U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the utility model discloses a distribution box, a battery pack and a vehicle, wherein the distribution box comprises a shell, components and an insulating layer, and the components are arranged on the shell; the insulating layer is insulating paint, and at least one part of the shell and the surface of the component are covered with the insulating paint.
Description
Technical Field
The utility model belongs to the technical field of vehicle manufacturing, and particularly relates to a distribution box, a battery pack and a vehicle.
Background
New energy automobiles are being developed by the nation as a new scheme for solving the serious environmental pollution and energy shortage. The distribution box is used as a core component of the electric automobile, and has the functions of current and voltage collection and distribution and the functions of real-time data exchange of the battery pack and the whole automobile. The safety of the distribution box is primarily considered as the safety problem of the new energy automobile.
If an insulating layer is arranged at the electric connection part of the components, the electric connection effect between the components can be influenced. Therefore, in order to improve the safety performance of the distribution box, the common practice in the prior art is to provide an insulating baffle between the electrical components, and simultaneously, part of components of the distribution box are separately provided with an insulating layer before assembly.
However, the volume utilization rate of the existing distribution box is up to more than 70%, the effective insulation distance in the distribution box is more and more short, and the insulation baffle is extremely easy to fail due to electrical breakdown. In addition, the distribution box is not completely sealed for facilitating heat dissipation, and each component in the distribution box is provided with a bare conductive area. Therefore, the distribution box is very easy to cause arc discharge due to the entering of electrolyte such as external rainwater, and the normal use of the distribution box is affected.
Disclosure of Invention
The utility model aims to provide a novel technical scheme of a distribution box, a battery pack and a vehicle.
According to a first aspect of the present utility model, there is provided a distribution box including a housing, components and an insulating layer, the components being disposed on the housing; wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer is insulating paint, and at least one part of the shell and the surface of the component are covered with the insulating paint.
Optionally, the insulating layer is configured to be coated on at least a portion of the housing and a surface of the component by integral dip coating after the component is assembled with the housing.
Optionally, the component comprises a conductive area and a non-conductive area, and the component is electrically connected with the outside through the conductive area; wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer covers the conductive region and at least part of the non-conductive region of the component.
Optionally, the insulating layer is provided as a unitary structure.
Optionally, the insulating paint is a silicone resin paint, a polyurethane paint, an acrylate resin paint or an epoxy resin paint.
Optionally, the insulating paint is a heat conducting paint.
Optionally, the thickness of the insulating varnish is less than or equal to 200 μm.
Optionally, the number of the components is at least two.
Optionally, a total positive connecting piece and a total negative connecting piece are arranged on the outer side of the shell, the components comprise a pre-charging relay, a main positive relay and a main negative relay which are sequentially arranged, the pre-charging relay, the main positive relay and the main negative relay form a series circuit, wherein,
the pre-charging relay is electrically connected with the total positive connecting piece, and the main negative relay is electrically connected with the total negative connecting piece;
the shell is internally provided with a loop circuit board, a plurality of components are integrated on the loop circuit board, and the components are connected in series through the loop circuit board.
According to a second aspect of the present utility model, there is also provided a battery pack comprising the electrical box of the first aspect.
According to a third aspect of the present utility model, there is also provided a vehicle including the battery pack of the second aspect.
The utility model has the technical effects that:
according to the utility model, the insulating paint is directly used as an insulating protective layer, each component can be independently insulated, and the whole vacuum dip-coating is only needed after the assembly of the distribution box is completed. The utility model omits the complex process of separately insulating and protecting the position of the metal conductor in the distribution box. The insulating layer formed by integrally dip-coating the insulating paint is arranged in the distribution box, so that the possibility of conducting arc discharge caused by air breakdown of the distribution box or conducting short-circuit arc discharge caused by electrolyte leakage or rainwater entering is reduced, and the risk of combustion explosion caused by discharge arc discharge of the battery pack is reduced. The distribution box adopted by the utility model has the advantages of simple processing procedure, low comprehensive cost, high insulation efficiency and high safety.
Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
Fig. 1 is a schematic diagram of an overall structure of a distribution box according to an embodiment of the present utility model.
Reference numerals illustrate:
1. a housing; 2. a total positive connection; 3. a total negative connection; 4. pre-charging a relay; 5. a main positive relay; 6. a main negative relay; 7. a loop circuit board; 8. and (5) insurance.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1, the present utility model discloses a power distribution box for a battery pack in an electric vehicle, for example.
Referring to fig. 1, the distribution box comprises a housing 1, components and an insulating layer, wherein the components are arranged on the housing; wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer is insulating paint, and the surface of at least one of the component and the shell 1 is covered with the insulating paint.
Referring to fig. 1, the distribution box includes a housing 1, an accommodating space is provided in the housing 1, and components including at least one are provided in the housing 1.
In the prior art, metal conductors are arranged on components in the distribution box and are used for being electrically connected with the outside. For example, the components are electrically connected through metal conductors, and the components are electrically connected with an external electrical appliance through metal conductors. The metal conductor part of the component is exposed to ensure the electrical connection between the component and the outside. However, since there is a bare metal conductor, the distribution box is extremely susceptible to arcing due to insulation failure caused by the ingress of electrolyte such as external rainwater, which affects the normal use of the distribution box.
In order to solve the above problems, the distribution box provided by the utility model further comprises an insulating layer, wherein the insulating layer is insulating paint, at least one part of the shell 1 and the surfaces of components are covered with the insulating paint, and the insulating paint is cured to form the insulating layer. The insulating layer is used for insulating and protecting the shell 1 and components.
Wherein, the surface of components and parts all covers and has the insulating layer to cover the bare metal conductor between components and parts and the external electrical apparatus, thereby improve the insulating effect in the block terminal, reduce because electrolyte is like outside rainwater gets into in the block terminal, lead to the block terminal insulation failure to arouse the arc, improve the insulating effect of block terminal.
In addition, since the insulating layer is formed by curing an insulating varnish and the housing is assembled with the component, at least a portion of the housing is also covered with the insulating layer, for example, a portion of the housing in contact with the component during the application of the insulating varnish. Thereby further improving the insulation effect inside the distribution box.
In the embodiment of the present utility model, the insulating layer is configured to be coated on at least a portion of the housing 1 and the surface of the component by an integral dip coating manner after the component is assembled with the housing 1.
Specifically, in the utility model, firstly, the components and the shell 1 are assembled, after stable electric connection between a plurality of components and between the components and the shell 1 are ensured, the assembled distribution box is wholly immersed in a container filled with insulating paint for dip coating, so that the surfaces of the components and at least part of the surfaces of the shell are covered with the insulating paint. After the dip-coating is finished, the whole distribution box is placed for more than 10 hours at normal temperature or is baked at the temperature of less than 110 ℃ to realize the solidification of the insulating paint, and the processing of the insulating layer is finished after the insulating paint is solidified.
In the distribution box structure provided by the utility model, the insulation layer is formed by adopting an integral dip-coating mode after the components are assembled, and the insulation layer covers the surface of the components and at least a part of the surface of the shell, so that the insulation protection of the exposed metal conductors arranged on the components is realized. Therefore, on the premise of ensuring normal operation of components in the distribution box, the insulation protection of the whole distribution box is realized, and the insulation effect of the whole distribution box is improved.
Preferably, in the embodiment of the present utility model, the insulating paint covers the entire surfaces of the housing 1 and the components of the components by means of vacuum impregnation.
According to the utility model, the insulating paint is directly used as an insulating protective layer, each component can be independently insulated, and the whole vacuum dip-coating is only needed after the assembly of the distribution box is completed. The utility model omits the complex process of separately insulating and protecting the position of the metal conductor in the distribution box. The insulating layer formed by integrally dip-coating the insulating paint is arranged in the distribution box, so that the possibility of conducting arc discharge caused by air breakdown of the distribution box or conducting short-circuit arc discharge caused by electrolyte leakage or rainwater entering is reduced, and the risk of combustion explosion caused by discharge arc discharge of the battery pack is reduced. The distribution box adopted by the utility model has the advantages of simple processing procedure, low comprehensive cost, high insulation efficiency and high safety.
In the embodiment of the utility model, the component comprises a conductive area and a non-conductive area, and the component is electrically connected with the outside through the conductive area; wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer covers the conductive region and at least part of the non-conductive region of the component.
Wherein the conductive areas, i.e. the parts of the component arranged for electrical connection.
The conductive region is, for example, a metal conductor, and specifically, a metal conductor for electrical connection is connected to the component. The metal conductors are, for example, metal connectors arranged on the surfaces of the components, and the components connected with each other are electrically connected by being in contact with the conductors.
The conductive region is, for example, a wire disposed on the component, the first end of the metal conductor is connected to the component, and the second end of the metal conductor extends in a direction away from the surface of the component. The end of the wire remote from the component is used for electrical connection with the housing 1 or other component.
The non-conductive areas are parts of the component that are not used for electrical connection. Such as the outer surface of the component.
After the component and the shell are assembled, part of the conductive area of the component is contacted with the conductive area of the shell or other components, and meanwhile, part of the conductive area of the component is in a bare state.
According to the utility model, the insulating layer is covered on the exposed conductive area of the component by adopting an integral dip-coating mode. Meanwhile, as dip coating is performed after the shell and the components are assembled, part of non-conductive areas of the components can also cover the insulating layer. Thereby, the insulating layer in the block terminal that this application provided has guaranteed the stable electricity between the components and parts and is connected, has realized simultaneously the insulating protection between components and parts and the casing, has further improved the inside insulating effect of block terminal.
In the embodiment of the utility model, the insulating layer is arranged as an integral structure.
In the utility model, components and parts are assembled with a shell, and then the assembled shell and components are integrally placed in insulating paint for dip coating so as to form an insulating layer. The insulating layer thus formed is of unitary construction.
That is, the components and the insulating layer covered on the surface of the shell are all continuous structures. For example, the insulating layer covers the conductive area and part of the non-conductive area of the component at the same time, and the shape of the insulating layer is fit with the shape of the component.
In the utility model, the insulating paint has the functions of sealing, insulating, scratch prevention and the like, so that the insulating layer covers the shell and the components in a dipping mode.
Preferably, in the embodiment of the present utility model, the insulating paint is a silicone resin paint, a polyurethane paint, an acrylate resin paint or an epoxy resin paint. Preferably a silicone or epoxy paint. So that the insulating paint has good insulating property.
Preferably, in an embodiment of the present utility model, the insulating paint is a heat-conducting paint. The insulating paint can be pure resin or heat conducting powder can be added to increase heat dissipation, and preferably, the insulating paint has good adhesion to substrates (namely the shell 1 and components) contacted in the distribution box, and vibration is not degummed. Specifically, the bonding strength of the insulating paint to aluminum is more than or equal to 0.3MPa, and the proportion of the spalled region of the aluminum plate by a hundred-lattice method is less than 10%. According to the utility model, the insulating paint is kept good adhesion with the surfaces of components in the distribution box, so that the insulating paint is prevented from being debonded when the distribution box vibrates along with the whole vehicle.
Preferably, in an embodiment of the present utility model, the thickness of the insulating layer is less than or equal to 200 μm.
The greater the thickness of the insulating layer, the longer the curing time of the insulating varnish, the more insulating varnish is required and the higher the cost. In the utility model, when the thickness of the insulating layer is less than or equal to 200 mu m, the insulating layer has good insulating property and scratch resistance, and meanwhile, the required curing time is shorter, the processing is convenient and the cost is lower.
Preferably, the insulating paint adopted by the utility model has excellent flame retardant property and can cut off the combustion of the shell 1 and components in extreme cases. Specifically, the insulating layer obtained after the insulating paint is cured can be coated with aluminum with the flame retardant rating of 100 mu m V, more preferably 100 mu m V0.
Preferably, the insulating voltage leakage current of the AC 3000V and 60S after the insulating paint is cured is less than or equal to 3mA, more preferably less than or equal to 1mA, and most preferably less than or equal to 0.3mA;
preferably, the viscosity of the insulating paint in the utility model is less than or equal to 5000cps, more preferably less than or equal to 3000cps after mixing, and most preferably less than or equal to 1000cps after mixing. Since irregular gaps exist in the distribution box, the narrowest gap may be only 1mm, and thus the fluidity of the insulating paint used in the present utility model must be very good.
Preferably, the normal-temperature surface drying time of the insulating paint is more than or equal to 60min, and more preferably the surface drying time is more than or equal to 120min.
Preferably, the insulating layer has good scratch resistance, particularly, the insulating layer with 100 mu m of aluminum coating can pass the GB/T9279 scratch test on the load of A10N, so that the conductive area is exposed and the insulation failure caused by scratches during transportation and carrying is prevented.
In the embodiment of the utility model, the number of the components is at least two. The components are electrically connected through conductors and assembled in the shell.
In the embodiment of the utility model, a total positive connecting piece 2 and a total negative connecting piece 3 are arranged on the outer side of the shell 1, the components comprise a pre-charging relay 4, a main positive relay 5 and a main negative relay 6 which are sequentially arranged, the pre-charging relay 4, the main positive relay 5 and the main negative relay 6 form a series circuit, wherein,
the pre-charging relay 4 is electrically connected with the total positive connecting piece 2, and the main negative relay 6 is electrically connected with the total negative connecting piece 3;
the shell 1 is internally provided with a loop circuit board 7, a plurality of components are integrated on the loop circuit board 7, and the components are connected in series through the loop circuit board 7.
As shown in fig. 1, the distribution box disclosed in the embodiment of the utility model comprises a shell 1, wherein a cavity is formed in the shell 1, a total positive connecting piece 2 and a total negative connecting piece 3 are arranged on the surface of the shell 1, a pre-charging relay 4, a main positive relay 5 and a main negative relay 6 are arranged in the cavity in the shell 1, and the three are sequentially distributed from left to right. The pre-charging relay 4, the main positive relay 5 and the main negative relay 6 are connected in series through conductors, wherein the positive electrode of the pre-charging relay 4 is electrically connected with the total positive connecting piece 2, and the negative electrode of the pre-charging relay 4 is electrically connected with the main positive relay 5. The positive pole of the main negative relay 6 is electrically connected with the main positive relay 5, and the negative pole of the main negative relay 6 is electrically connected with the main negative connecting piece, so that the assembly of components in the shell 1 is realized.
Referring to fig. 1, a circuit board 7 is further provided on a side wall of the case 1, and the circuit board 7 is connected with a pre-charge resistor, and a plurality of components are integrated on the circuit board 7 and connected in series. The circuit board is integrated with a plurality of components, so that the components are assembled, and the integration level of the distribution box is improved.
Compared with the mode of fixing components by bolts in the related art, the method omits a large number of fixing bolts, simplifies assembly procedures and further reduces cost. Therefore, the distribution box provided by the embodiment of the utility model has the advantages of simple structure, high integration level, high production efficiency, lower cost, better sealing performance, insulating performance, better vibration resistance and the like.
Preferably, referring to fig. 1, in the embodiment of the present utility model, the component further includes a safety device 8, and the safety device 8 is connected in series with the component. The safety 8 provided by the utility model can be fused in time when a circuit is short-circuited, so that the circuit in the distribution box is broken, and the protection of the distribution box is realized.
The present application has performed the following tests on the insulation effect of the provided insulation layer:
experiment 1
The insulating paint selected in the experiment has the density of 1.05g/cm 3 The insulating paint has the viscosity of 500cps, the flame retardant grade of 100 mu m V0 of aluminum coating and the normal temperature surface drying time of 4 hours.
Firstly, after the components of the distribution box are assembled, the distribution box is dip-coated with insulating paint in vacuum. During dip coating, in order to ensure that gaps are fully filled, vacuum defoaming auxiliary dip coating and repeated dip coating are needed for 3 times, and the assembly of the distribution box is completed after the distribution box is cured for 4 hours at normal temperature.
Experiment 2
(compared with experiment 1, the product is replaced by epoxy insulating paint)
The density of the insulating paint selected in the experiment is 1.03g/cm 3 The viscosity was 750cps and the flame retardant rating was 100 mu m V1 for aluminum coating.
Firstly, after the components of the distribution box are assembled, the distribution box is dip-coated with insulating paint in vacuum. During dip coating, in order to ensure that gaps are fully filled, vacuum defoaming auxiliary dip coating and repeated dip coating are needed for 3 times, and the assembly of the distribution box is completed after heating at 110 ℃ for 1 h.
Experiment 3
(compared with experiment 2, the product is replaced by acrylic ester insulating paint)
The density of the insulating paint selected in the experiment is 1.04g/cm 3 An insulating paint with the viscosity of 1300cps, the flame retardant grade of 100 mu m V1 of aluminum coating and the normal temperature surface drying time of 6 hours. Otherwise, experiment 2 was repeated.
Control experiment 1
Insulating plastic sheets are only added between high-voltage components to realize insulation, and insulating paint is not coated.
The test of the distribution box for the CTP battery pack provided by the embodiment of the utility model mainly comprises the steps of respectively clamping the total positive and total negative of the distribution box by using the positive and negative poles of a voltage withstand tester, and performing insulation protection on the clamping exposed part. Then, the distribution box is immersed in 0.5%wt of saline water, 600V direct current voltage (relay actuation) is added, and the observation is continued for 2 hours, so as to check whether the leakage current exceeds 20mA and whether arcing occurs or not.
The results are shown in table 1 below:
TABLE 1
| Experiment 1 | Experiment 2 | Experiment 3 | Control experiment 1 | |
| Duration of time | 2h | 2h | 2h | 2h |
| Whether or not the distribution box is submerged | Is that | Is that | Is that | Is that |
| Maximum leakage current | 1.5mA | 1.6mA | 1.2mA | ＞20mA |
| 2h whether or not arcing occurs | Without any means for | Without any means for | Without any means for | Immediate arc discharge |
According to the table 1, the distribution box provided by the utility model directly uses the insulating impregnating varnish as the insulating protective layer, so that the risk of short circuit arcing caused by leakage of water, electrolyte, cooling liquid and other conductive liquids in the abnormal extreme case of the distribution box is greatly reduced.
The utility model also provides a battery pack which comprises the distribution box and the battery core, wherein the positive electrode of the battery core is electrically connected with the total positive connecting piece 2 of the distribution box, and the negative electrode of the battery core is electrically connected with the total negative connecting piece 3 of the distribution box.
The utility model also provides a vehicle comprising the battery pack.
While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (11)
1. The distribution box is characterized by comprising a shell (1), components and an insulating layer, wherein the components are arranged on the shell (1); wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer is insulating paint, and at least one part of the shell (1) and the surface of the component are covered with the insulating paint.
2. The electrical box according to claim 1, characterized in that the insulating layer is configured to be applied to at least a part of the housing (1) and the surface of the component by means of integral dip coating after the component has been assembled with the housing (1).
3. The electrical box according to claim 1 or 2, wherein the component comprises a conductive area and a non-conductive area, and the component is electrically connected with the outside through the conductive area; wherein, the liquid crystal display device comprises a liquid crystal display device,
the insulating layer covers the conductive region and at least part of the non-conductive region of the component.
4. A distribution box according to claim 1 or 2, characterized in that the insulating layer is provided as a unitary structure.
5. The electrical box according to claim 1 or 2, characterized in that the insulating paint is a silicone resin paint, a polyurethane paint, an acrylate resin paint or an epoxy resin paint.
6. The electrical box according to claim 1 or 2, characterized in that the insulating varnish is a heat-conducting varnish.
7. The electrical box of claim 1 or 2, wherein the insulating layer has a thickness of less than or equal to 200um.
8. A power distribution box according to claim 1 or 2, characterized in that the number of components is at least 2.
9. The distribution box according to claim 1 or 2, characterized in that a total positive connection (2) and a total negative connection (3) are arranged on the outer side of the shell (1), the components comprise a pre-charging relay (4), a main positive relay (5) and a main negative relay (6) which are arranged in sequence, the pre-charging relay (4), the main positive relay (5) and the main negative relay (6) form a series circuit, wherein the pre-charging relay (4) is electrically connected with the total positive connection (2), and the main negative relay (6) is electrically connected with the total negative connection (3); a loop circuit board (7) is arranged in the shell (1), a plurality of components are integrated on the loop circuit board (7), and the components are connected in series through the loop circuit board (7).
10. A battery pack comprising the electrical box of any one of claims 1-9.
11. A vehicle comprising the battery pack of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320354988.6U CN219498639U (en) | 2023-02-17 | 2023-02-17 | Distribution box, battery pack and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320354988.6U CN219498639U (en) | 2023-02-17 | 2023-02-17 | Distribution box, battery pack and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219498639U true CN219498639U (en) | 2023-08-08 |
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ID=87477650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320354988.6U Active CN219498639U (en) | 2023-02-17 | 2023-02-17 | Distribution box, battery pack and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219498639U (en) |
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2023
- 2023-02-17 CN CN202320354988.6U patent/CN219498639U/en active Active
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