CN111916612A

CN111916612A - Vehicle-mounted double-battery system

Info

Publication number: CN111916612A
Application number: CN202010884999.6A
Authority: CN
Inventors: 施昊菅; 张卓益; 吴晗青; 关鹏; 靖文祥; 丁双青
Original assignee: Zhejiang Hengrui Technology Co ltd
Current assignee: Zhejiang Hengrui Technology Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2020-11-10

Abstract

The invention discloses a vehicle-mounted double-battery system, which comprises: a main box body; an auxiliary box body; a battery module; a BCMU module; a BMU module; the battery module is installed in the main box body and the auxiliary box body, the BCMU module is installed in the main box body, the BMU module is installed in the main box body and the auxiliary box body respectively, the main box body and the auxiliary box body are connected in a plug wire mode, the battery module in the main box body is installed in the box body in a single-layer mode, the BCMU module is fixed at the inner side end of the main box body, the BCMU module is in communication connection with the BMU module, and the BMU module is in communication connection with the battery module.

Description

Vehicle-mounted double-battery system

Technical Field

The invention relates to the field of batteries, in particular to a vehicle-mounted double-battery system.

Background

In the prior art, a vehicle-mounted battery system is generally configured as a single box structure, a plurality of battery modules are placed in the box, and the battery modules are inserted into preset positions in the box. Wherein in order to reach preset discharge capacity and discharge current, the battery module of single box can be about usually or transversely the stack installation, and such mounting structure makes the heat in the box great, is difficult to the heat dissipation to the battery module of stack installation only passes through the support fixed, drops easily in the road of injustice, influences the safety in utilization of battery.

Object of the Invention

One purpose of the invention is to provide a vehicle-mounted double-battery system, which is provided with two boxes, wherein the two boxes comprise a main box and an auxiliary box, and different battery packs are respectively installed and fixed, so that the heat dissipation efficiency of batteries can be improved. The main box body and the auxiliary box body are provided with BMU modules, wherein the main box body is internally provided with BCMU modules, the main box body and the auxiliary box body are respectively provided with a plurality of interfaces, the plurality of interfaces comprise power interfaces and communication interfaces, the transmission and the management of battery data are realized through the interface modes corresponding to the plug wire communication, and the operation safety of the battery modules in the two box bodies can be ensured.

Another object of the present invention is to provide a vehicle-mounted dual battery system, in which a bundling structure is adopted to fix a battery module in a box, so that the displacement caused by the expansion of the battery module can be reduced, and the fixing effect of the battery module in the box can be greatly improved.

The invention also aims to provide a vehicle-mounted double-battery system, wherein the outer surface interfaces of the main box body and the auxiliary box body of the vehicle-mounted double-battery system are waterproof interfaces, so that the battery system can be prevented from being influenced by environmental rainwater.

Another object of the present invention is to provide a vehicle-mounted dual battery system, in which a single-layer layout is adopted for a main tank and an auxiliary tank of the vehicle-mounted dual battery system, so that the volume and mass of a single tank can be reduced, and the auxiliary tank is connected to the main tank in a wire insertion manner, so that battery packs of the main tank and the auxiliary tank can be maintained and replaced conveniently.

In order to implement at least one of the above inventive methods, the present invention further provides a vehicle-mounted dual battery system, the system comprising:

a main box body;

an auxiliary box body;

a battery module;

a BCMU module;

a BMU module;

the battery module is installed in the main box body and the auxiliary box body, the BCMU module is installed in the main box body, the BMU module is installed in the main box body and the auxiliary box body respectively, and the main box body and the auxiliary box body are connected in a plug wire mode.

According to a preferred embodiment of the present invention, the battery modules in the main box are mounted in a single layer in the main box, the BCMU module is fixed at an inner end of the main box, the BCMU module is communicatively connected to the BMU module, and the BMU module is communicatively connected to the battery modules.

According to a preferred embodiment of the present invention, the main case and the sub case are respectively provided at the bottom thereof with reinforcing ribs having a cross structure, the upper surface of each reinforcing rib is provided with a plurality of threaded holes, and the bottom surface of the corresponding battery module is provided with threaded holes for threadedly fixing the battery module to the bottoms of the main case and the sub case.

According to a preferred embodiment of the present invention, the main box body includes four side plates, a plurality of threaded holes are formed at tops of the four side plates, the main box body has a cover plate, and the edge of the cover plate has threaded holes opposite to the threaded holes at the tops of the side plates for threadedly coupling the cover plate to the main box body.

According to one preferred embodiment of the present invention, the battery module has an insulating side plate, an insulating cover plate and an insulating bottom plate, the battery module has a plurality of battery cells arranged in a row, the top of the battery cell has a plurality of harness fixing plates, each harness fixing plate has two harness ports, and the two harness ports are respectively sleeved on positive and negative terminals of the battery cell.

According to one preferred embodiment of the invention, the wire harness fixing plates are arranged above each electric core, a bayonet is arranged between every two adjacent wire harness fixing plates, and the bayonet of the adjacent wire harness fixing plates is connected through a clamping piece and is used for fastening the electric core to connect with the aluminum bar so as to prevent stripping.

According to one of the preferred embodiments of the present invention, an explosion-proof valve is disposed on the top of each cell for venting the internal pressure of the cell.

According to another preferred embodiment of the invention, the adjacent battery modules are connected end to end by adopting soft copper bars, the double-battery system is provided with a main bus bar, the outer side of the main box body is provided with a main positive power interface and a main negative power interface, and the main bus bar is respectively and electrically connected with the main positive power interface and the main negative power interface.

According to another preferred embodiment of the present invention, the outer surface of the main box further comprises two power interfaces and an internal communication interface, the outer surface of the auxiliary box is provided with a power interface and an internal communication interface which are matched with the main box, the battery system comprises a plurality of waterproof plug wires, and the plurality of waterproof plug wires are respectively connected with the corresponding power interfaces and internal communication interfaces on the main box and the auxiliary box.

According to another preferred embodiment of the present invention, the main box further comprises an external communication interface, and the external communication interface is connected to the BCMU module and is configured to communicate with an external network.

According to another preferred embodiment of the present invention, the main box has a PDU module therein; the PDU module is respectively and electrically connected with the BCMU module and the BMU module and is used for supplying power and controlling the output configuration of the power supply in the main box body.

According to another preferred embodiment of the present invention, a fuse is disposed in the sub-tank, and the fuse is connected to a bus bar in the sub-tank, so as to protect the safety of the battery module and the BMU module of the sub-tank.

Drawings

Fig. 1 is a schematic perspective view showing a vehicle-mounted dual battery system according to the present invention;

FIG. 2 is a schematic diagram illustrating a top view of a preferred embodiment of a vehicle-mounted dual battery system in accordance with the present invention;

FIG. 3 is a schematic side view of a preferred embodiment of an in-vehicle dual battery system of the present invention;

fig. 4 is an exploded view of a battery module in a vehicle-mounted dual battery system according to the present invention.

Wherein

A main box body-10, a clamping plate-101, a BCMU module-11, a first BMU module-12, a PDU module-14, an external communication interface-15, a first internal communication interface-16, a first power transmission interface-17, a second power transmission interface-18, a total positive power transmission interface-19, a total negative power transmission interface-191, an auxiliary box body-20, a second BMU module-21, a fuse-22, a third power transmission interface-23, a fourth power transmission interface-24, a second internal communication interface-25, a battery module-30, a copper aluminum bar composite pole piece-31, a wire harness fixing plate-32, an electric core-33, an insulating partition plate-34, an insulating plate shell plate-35, an insulating sheath-36, a pole connecting aluminum bar-37, explosion-proof valve-38, soft copper bar-39, waterproof plug-wire-40, power plug-wire-41, communication plug-wire-42.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 3, the present invention provides a schematic diagram of a vehicle-mounted dual battery system, where the vehicle-mounted dual battery system includes a main box 10 and an auxiliary box 20, the main box 10 has a plurality of battery modules 30 therein, the main box 10 also has a BCMU module 11 and a BMU module therein, specifically, a first BMU module 12 is installed and fixed in the main box 10, the first BMU module 12 is communicatively connected to the BCMU module 11, the first BMU module 12 is connected to the battery modules 30, and the first BMU module 12 has a temperature and voltage sampling harness for collecting the BCMU module 11. The temperature and voltage of each battery pack in the main box body 10 are transmitted to the main box body 10, the bottom of the main box body 10 is provided with a cross-shaped reinforcing rib, and the battery module 30 is fixed on the reinforcing rib through threads.

And a second BMU module 21 is arranged in the auxiliary box body 20, the second BMU module 21 is provided with a temperature and voltage sampling wire harness, and the temperature and voltage sampling wire harness is connected with the battery modules 30 in the auxiliary box body 20 and is used for acquiring the temperature and voltage data of each battery module 30 in the auxiliary box body 20 in real time. Wherein the second BMU module is communicatively connected to the BCMU module 11.

It should be noted that the battery modules 30 are arranged in the main case 10 and the sub-case 20 in a single layer, and the power and data transmission is realized by means of plug wires through the power interface and the communication interface on the outer surfaces of the main case 10 and the auxiliary case 20, the power interface is communicated with the battery module 30 in the box body, the plug wire is a waterproof plug wire 40 and comprises a power plug wire 41 and a communication plug wire 42, specifically, the main casing 10 includes a first power transmission interface 17 and a second power transmission interface 18, the corresponding sub-tank 20 includes a third power transmission interface 23 and a fourth power transmission interface 24, the first power transmission interface 17 and the third power transmission interface 23 are connected by a power plug wire 41, the second power transmission interface 18 and the fourth power transmission interface 24 are connected by a power plug wire 41, and are used for transmitting electric energy of the battery modules 30 in the main box 10 and the auxiliary box 20. Communication interface includes internal communication interface and external communication interface 15, the surface of main box 10 and auxiliary box 20 is equipped with corresponding first internal communication interface 16 and second internal communication interface 25 respectively, first internal communication interface 16 adopts communication plug wire 42 to connect second internal communication interface 25, second internal communication interface 25 communication connection is located second BMU module 21 in the auxiliary box 20, first internal communication interface 16 is connected and is located BCMU module 11 in the main box 10 for to BCMU module 11 transmits the voltage and the temperature information of battery module 30 in the auxiliary box 20. BCMU module 11 connect be located the external communication interface 15 of main box 10 surface can be used to the battery module 30 data that corresponds of transmission to the host computer.

The medial surface of two long curb plates of main box 10 and auxiliary box 20 has a plurality of pairs of card holes of relative setting respectively, the card hole is slightly higher than battery mould 30, be equipped with a plurality of cardboard 101 in main box 10 and the auxiliary box 20, cardboard 101 both ends with card hole looks adaptation is used for with cardboard 101 installation is fixed in on the card hole, and works as when cardboard 101 installation is fixed in the box, cardboard 101 is pressed close to relatively the battery module upper surface for the motion space of restriction battery module, thereby produces great impact when avoiding battery module vertically to break away from. The first BMU module 12 is arranged above the clamping plate 101 in the main box body, so that the influence of the heating of the battery module 30 on the first BMU module 12 can be effectively reduced, and the service life of the BMU module is prolonged.

In order to better illustrate the present invention, the present invention further provides a structure of a battery module 30, please refer to fig. 4, the battery module 30 includes a plurality of battery cells 33, the side surfaces of the plurality of battery cells 33 are aligned and closely arranged to form an array of battery cells 33, an explosion-proof valve 38 is disposed at the top of each battery cell 33 for discharging the pressure inside the battery cell 33, and an insulating partition 34 is disposed at the side surface of each battery cell 33 for isolating the adjacent battery cells 33. Six surfaces of electric core 33 array are equipped with respectively insulation shell plate 35, the insulation board includes insulating cover plate, insulating curb plate and insulating bottom plate, is set up respectively in electric core 33 array's higher authority, side and bottom surface. A wiring harness fixing plate 32 is arranged above each electric core 33 of the electric core 33 array, the wiring harness fixing plate 32 is provided with two wiring harness ports, wiring harnesses of positive and negative terminals of the electric core 33 are led out from the wiring harness ports, and the wiring harness ports are sleeved on the positive and negative terminals of the electric core 33. Wherein two bayonets have on the pencil fixed plate 32, work as when pencil fixed plate 32 becomes the array and sets up in the top of electric core 33, the block is connected between the adjacent two pencil boards to can fasten electric core and connect aluminium ba 33 and prevent to peel off, battery module 30 still has utmost point post and connects aluminium ba 27, utmost point post connection aluminium ba 27 locates pencil fixed plate 32 top, utmost point post connection aluminium ba 27 is wide aluminium ba structure, can reduce utmost point post temperature rise, improves the heat dispersion of utmost point post. The surface of the pole connecting aluminum bar 27 is provided with a nickel layer, and the nickel plating process is adopted to cover the surface of the pole connecting aluminum bar 27 with the nickel layer capable of preventing oxidation, so that the contact internal resistance heating and energy loss can be reduced.

Battery module 30 still includes the mounting panel, the mounting panel is located respectively battery module 30's two sides, the mounting panel inboard has the insulation board the mounting panel top has the recess, installation insulating sheath 36 in the recess, and be equipped with copper aluminium bar composite electrode piece 31 in the insulating sheath 36, copper aluminium bar composite electrode piece 31 is battery module 30's input/output terminal, and its manufacturing process is cold rolling shaping to can ensure the joint strength between the different modules, battery module 30 still includes soft copper bar 39, soft copper bar 39 gathers current integration with different battery module 30 as the busbar, and connects double cell system's power interface, and external output power can reduce the pressure drop effectively through soft copper bar 39, and guarantee electric power switches on.

Further, a PDU module 14 is further disposed in the main box 10, the PDU module 14 is connected to the BCMU module 11 and the first BMU module 12, and may be used to supply power to the BCMU module 11 and the first BMU module 12, and meanwhile, the BCMU module 11 may control power supply configuration of the PDU module 14, and is used to control external total input and total output of the dual-battery system.

The main box body 10 and the auxiliary box body 20 are respectively provided with a cover plate, the main box body 10 is provided with four side plates with square structures, the side plates are connected end to end and connected with a bottom plate of the main box body 10 to form a long and narrow accommodating cavity, a plurality of threaded holes are formed in the four square side plates, the lower edge of the cover plate of the main box body 10 is correspondingly provided with penetrating threaded holes, and the cover plate of the main box body 10 can be fixed above the main box body 10 through threaded connectors. Further, the edge that main box 10 and apron link to each other sets up sealing strip or sealed glue, sealing strip or sealed glue cover whole box curb plate with the joint gap of apron to make the apron install in when on the main box 10, main box 10 can reach IP67 level water-proof effects, is adapted to rainwater weather, the mounting structure of the inside battery module group 30 of auxiliary box 20 is the same with main box 10. The upper surface of the bottom plate of the main box body 10 is provided with a reinforcing rib of a cross structure, the insulating bottom plate of the battery module 30 is provided with a threaded hole, the battery module 30 can be fixed at the intersection of the reinforcing rib through a screw and other devices, and the tensile force in all directions can be effectively dispersed. Each battery module 30 is connected with the other through the soft copper bar 39 and the aluminum copper bar composite pole piece, so that the connection strength and the electric conduction capability of the battery modules 30 can be considered at the same time. Each battery module 30 adopts the structure of tying up to fasten the battery cell 33, can prevent the battery cell 33 inflation and produce the displacement.

The main tank body 10 and the auxiliary tank body 20 are made of SPCC materials, so that the main tank body 10 and the auxiliary tank body 20 have high durability, heat resistance and heat reflectivity, and have good plasticity and welding performance simultaneously, the main tank body 10 structure adopts finite element analysis demonstration, and the structure meets the use requirements of various severe scenes, a fuse 22 is arranged in the auxiliary tank body 20, the fuse 22 is connected with a total busbar in the auxiliary tank body 20, and when the temperature is too high, the fuse 22 can cut off the power transmission of the battery module 30 in the auxiliary tank body 10.

The outer surface of the main box body 10 further comprises an external communication interface 15, a switch and a total power interface, wherein the total power interface is connected with the internal BCMU module 11 and the battery module 30, the total power interface comprises a total positive power interface and a total negative power interface and is used for outputting positive power to do work and outputting negative power to do work, and the positive power and the negative power can be achieved by changing the current flowing direction. Various interfaces on the outer surface of the main box body 10 adopt different colors and interface shapes, the same interfaces of the main box body 10 and the auxiliary box body 20 adopt the same structural design, different interfaces adopt different interface designs, and through the foolproof design, the connection error between the main box body 10 and the auxiliary box body 20 can be avoided, and the learning cost of installation personnel is reduced.

It will be understood by those skilled in the art that the embodiments of the present invention described above and illustrated in the drawings are given by way of example only and not by way of limitation, the objects of the invention having been fully and effectively achieved, the functional and structural principles of the present invention having been shown and described in the embodiments, and that various changes or modifications may be made in the embodiments of the present invention without departing from such principles.

Claims

1. An on-board dual battery system, the system comprising:

a main box body;

an auxiliary box body;

a battery module;

a BCMU module;

a BMU module;

2. The vehicle-mounted dual-battery system according to claim 1, wherein the battery modules in the main box are mounted in the main box in a single-layer manner, the BCMU modules are fixed at the inner end of the main box, the BCMU modules are in communication connection with the BMU modules, and the BMU modules are in communication connection with the battery modules.

3. The vehicle-mounted double-battery system as claimed in claim 1, wherein the main box body and the auxiliary box body are respectively provided with reinforcing ribs in a cross structure, the upper surface of each reinforcing rib is provided with a plurality of threaded holes, and the bottom surface of the corresponding battery module is provided with a threaded hole for screwing the battery module to the bottom of the main box body and the bottom of the auxiliary box body.

4. The vehicle-mounted dual-battery system as claimed in claim 1, wherein the main box body comprises four side plates, a plurality of threaded holes are formed at tops of the four side plates, the main box body is provided with a cover plate, and edges of the cover plate are provided with threaded holes opposite to the threaded holes at the tops of the side plates for screwing the cover plate to the main box body.

5. The vehicle-mounted dual-battery system according to claim 1, wherein the battery module comprises insulating side plates, an insulating cover plate and an insulating bottom plate, the battery module comprises a plurality of battery cells arranged in rows, the top of each battery cell comprises a plurality of harness fixing plates, each harness fixing plate comprises two harness ports, and the two harness ports are respectively sleeved on positive and negative terminals of each battery cell.

6. The vehicle-mounted dual-battery system according to claim 5, wherein the harness fixing plates are arranged above each battery cell, bayonets are arranged between adjacent harness fixing plates, and the bayonets are connected with the bayonets of the adjacent harness fixing plates through clamping pieces and used for fastening the battery cells to connect the aluminum bars so as to prevent the aluminum bars from being peeled off.

7. The vehicle-mounted double-battery system as claimed in claim 5, wherein an explosion-proof valve is arranged on the top of each cell for discharging the internal pressure of the cell.

8. The vehicle-mounted double-battery system according to claim 1, wherein adjacent battery modules are connected end to end by soft copper bars, the double-battery system is provided with a total busbar, a total positive power interface and a total negative power interface are arranged on the outer side of the main box body, and the total busbar is electrically connected with the total positive power interface and the total negative power interface respectively.

9. The vehicle-mounted double-battery system according to claim 1, wherein the outer surface of the main box body further comprises two power interfaces and an internal communication interface, the outer surface of the auxiliary box body is provided with the power interface and the internal communication interface which are matched with the main box body, the battery system comprises a plurality of waterproof plug wires, and the waterproof plug wires are respectively connected with the corresponding power interfaces and the internal communication interfaces on the main box body and the auxiliary box body.

10. The vehicle-mounted dual-battery system according to claim 1, wherein the main box body further comprises an external communication interface, and the external communication interface is connected with the BCMU module and used for being communicated with an external network.

11. The vehicle-mounted dual-battery system according to claim 1, wherein the main box body is internally provided with a PDU module; the PDU module is respectively and electrically connected with the BCMU module and the BMU module and is used for supplying power and controlling the output configuration of the power supply in the main box body.