CN203596381U - Busbar module structural part - Google Patents

Abstract

The utility model relates to a bus-bar module structural part (1). Anodes (7) and cathodes (9) of a plurality of batteries (5) are alternately configured, and any group of adjacent anode and cathode in a battery aggregate (3) connected in series with the anodes and cathodes of adjacent batteries can be connected and disconnected by virtue of a service plug (71); the Busbar module structural part is provided with a plurality of first conductors (15) respectively connected between the adjacent anode and cathode of the battery aggregate (3), second conductors (21a, 21b) respectively connected with the main anode (17) and the main canoed (19) of the battery aggregate, third conductors (23a, 23b) connected with each other by virtue of the service plug and respectively connected with the group of adjacent anode and cathode, resin plates (27, 27a, 27b) formed by matching accommodating parts (45, 47a, 47b, 49a, 49b) for respectively accommodating the conductors with the the electrodes and divided along the space between any group of adjacent accommodating parts. The divided resin plates can be connected with each other.

Description

Bus bar module structure

technical field

The utility model relates to a bus bar module structural part, which is installed in a battery assembly composed of a plurality of batteries connected in series.

Background technique

In Patent Document 1, when a battery assembly in which a plurality of batteries are connected in series is used as a power source for driving a car or the like, the series connection of a set of electrodes in the positive and negative electrodes of adjacent batteries is made into an open state. , use the maintenance plug to carry out the disassembly and connection scheme between the two electrodes. In addition, when performing maintenance on the battery assembly or electronic equipment serving as a load of the battery assembly, the main circuit of the battery assembly is cut off by removing the maintenance plug to ensure safety. In particular, in Patent Document 1, receiving terminals are respectively provided on the positive and negative electrodes connected in series and opened, and a maintenance plug is detachably attached to the receiving terminals.

However, in Patent Document 1, since the maintenance plug is directly attached to the receiving terminal of the battery module, the battery module must be installed at a position where the maintenance plug can be detached. In addition, there is a problem that the shape of the maintenance plug is limited.

On the other hand, in Patent Document 2, it is proposed that in a battery pack composed of a plurality of battery assemblies connected in series, in order to arrange the maintenance plug at a position that is easy to handle, wires are respectively connected to the battery assemblies. A group of adjacent positive and negative poles of the body, and connect the socket to the end of the wire, fix the socket at the desired position, install the maintenance plug and make it removable.

However, in the case of connecting the electric wires to the electrodes as shown in Patent Document 2, it is necessary to connect the electric wires to the electrodes via terminals attached to the ends of the electric wires. However, Patent Document 2 does not consider the work of connecting the terminals to the electrodes.

In this regard, it can be considered to install terminals on the ends of a pair of electric wires connected to the maintenance plug, and hold the pair of terminals on a resin plate (hereinafter referred to as a resin plate) to form an intermediate module, and connect the intermediate module to the battery. A group of adjacent positive and negative poles of the assembly are installed in opposite positions. Here, each of the pair of terminals is provided with an insertion hole for inserting the electrode, and an opening is provided at a position facing the insertion hole on the resin plate. In addition, a group of adjacent positive and negative electrodes are formed with screw grooves for fastening nuts.

Thus, when the intermediate module is attached to a set of positive and negative electrodes in the battery assembly, since the positive and negative electrodes are inserted into the openings of the resin plate and protrude from the insertion holes of the terminals, respectively, by screwing the nuts into the protruding A pair of terminals can be connected to the electrodes, and the connection work can be easily performed.

prior art literature

Patent Document 1: Japanese Patent Laid-Open No. 2002-343331 (JP2002-343331A)

Patent Document 2: Japanese Unexamined Patent Publication No. 2009-152135 (JP2009-152135A)

Utility model content

On the other hand, in order to connect a plurality of batteries in series, the battery assembly is equipped with a bus bar module. The bus bar module is formed by holding a plurality of bus bars connecting adjacent positive electrodes and negative electrodes of the battery assembly, and terminals connecting the overall positive electrode or the overall negative electrode of the battery assembly to electric wires, respectively, on a resin plate. That is, in the battery assembly, along the arrangement direction of the plurality of electrodes, the bus bar modules are respectively installed on the overall positive electrode side and the overall negative electrode side of the intermediate module.

However, according to this configuration, since two bus bar modules are required in addition to the middle module, the number of parts increases. In addition, since the three modules of the above-mentioned intermediate module and the two bus bar modules must be separately attached to the battery assembly, the work load increases.

An object of the present invention is to reduce the number of parts while improving operability when a terminal connected to a maintenance plug is connected to an electrode.

In order to solve the above problems, in the bus bar module structure of the first aspect of the present invention, any group of battery assemblies in which the positive electrodes and negative electrodes of a plurality of batteries are arranged alternately and the positive electrodes and negative electrodes of adjacent batteries are connected in series through conductors Adjacent positive poles and negative poles can be connected and disconnected by means of maintenance plugs, and have: a plurality of first conductors respectively connected between adjacent positive poles and negative poles of the battery assembly; Two second conductors connected to the total negative pole; two third conductors connected to each other by means of a maintenance plug and respectively connected to the above-mentioned group of adjacent positive poles and negative poles; A resin plate formed in a coordinated manner by the arrangement of multiple electrodes. The resin plate is divided along any group of adjacent housing parts, and the divided resin plates can be connected to each other.

With such a configuration, by connecting the divided resin plates, the bus bar module structure for supporting all the conductors from the first conductor to the third conductor can be integrated. Therefore, by attaching the bus bar module structural member to the battery assembly, it is possible to improve workability when connecting each conductor to the corresponding electrode.

In the battery assembly, the number of batteries can be increased or decreased in accordance with changes in the specifications of the driving power supply or the like. Therefore, when the resin plates holding all the conductors are integrally formed, as the number of batteries increases or decreases, it is necessary to manufacture resin plates corresponding to the increased or decreased number of batteries. In the bus bar module structure according to the first aspect of the present invention, since the resin board can be divided, this point can be achieved by preparing several resin boards with different sizes (the number of housing parts, etc.) in advance and combining these resin boards. Respond to the increase or decrease in the number of batteries. Since the entire resin board is divided into two parts, the number of parts can be reduced compared to the case where three resin boards are formed corresponding to the third conductor and the two second conductors, respectively.

Among the divided one resin plate and the other resin plate in the resin plate, a convex portion can be formed on the surface of the one resin plate opposite to the other resin plate, A concave portion capable of locking the convex portion is formed on the surface to be placed. Thereby, attachment and detachment between resin boards can be performed with a simple and compact structure.

The bus bar module structural member according to the first aspect of the present invention may further include a plurality of terminals for voltage detection which are respectively in contact with the plurality of first conductors and accommodated in the housing portion, and a plurality of terminals respectively connected to the terminals for voltage detection. electric wire. The resin board may further have groove-shaped wire routing passages for accommodating the plurality of wires. The above-mentioned protrusions and recesses may also be formed at the bottom of the groove of the wire routing passage. By forming the convex portion and the concave portion as part of the bottom of the groove of the electric wire routing passage in this way, it is possible to prevent an increase in the size of the bus bar module structure.

The two adjacent housing portions for housing the third conductor may be surrounded by frame-shaped peripheral walls standing upright from the support surface on which the third conductor abuts. The resin plate may also be provided with an insulating cover capable of freely opening and closing the opening covering the peripheral wall. The insulating cover may be provided with a rib, and when the insulating cover covers the surrounding wall, the rib can enter the gap between the surrounding walls of adjacent accommodating parts.

With this structure, when the insulating cover covers the peripheral wall, the two adjacent housing portions for accommodating the third conductor are completely separated from each other along the entire vertical height direction of the peripheral wall by a pair of peripheral walls and the ribs. Therefore, a short circuit between the third conductors accommodated in the housing portion can be suppressed.

According to the bus bar module structural member of the first aspect of the present invention, it is possible to improve the operability when the terminal connected to the maintenance plug is connected to the electrode, and to reduce the number of parts.

Description of drawings

FIG. 1 is a schematic perspective view of a divided state of a resin plate that is a component of a bus bar module structure according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view of a connection portion between resin plates of FIG. 1 .

Fig. 3 is a plan view of a bus bar module structure mounted on a battery assembly.

FIG. 4 is a top view of the bus bar module structure in FIG. 3 covered by an insulating cover.

FIG. 5 is an enlarged plan view of part A in FIG. 3 .

Fig. 6 is an enlarged plan view of part B in Fig. 3 .

FIG. 7 is an enlarged plan view of part C in FIG. 3 .

FIG. 8 is an enlarged perspective view of the third housing portion in FIG. 1 .

FIG. 9 is a perspective view of the insulating cover of FIG. 4 .

Fig. 10 is a cross-sectional view after the rib in Fig. 9 enters between the extension walls in Fig. 8 .

Detailed ways

Hereinafter, a bus bar module structure according to an embodiment of the present invention will be described with reference to the drawings. The bus bar module structural member of this embodiment is suitable for use in parallel electric motors, such as electric vehicles (EV) running with the driving force of the electric motor, hybrid vehicles (HV) running with both the driving force of the engine and the electric motor, etc. power supply unit. As shown in FIGS. 1 to 7 , the bus bar module structure 1 according to the present embodiment is used in a state of being attached to a battery assembly 3 of a power supply device.

The battery assembly 3 has a plurality of rectangular parallelepiped batteries 5 and a fixing member (not shown) for superimposing and fixing the batteries 5 . Each battery 5 is formed with two electrode surfaces not adjacent to each other, one of which is provided with a protruding positive pole 7 as a positive electrode pole, and the other electrode surface is provided with a protruding negative pole 9 . The battery assembly 3 is connected in series by connecting the adjacent positive poles 7 and negative poles 9 of the plurality of batteries 5 with a plurality of first conductors 15 (bus bars) respectively. . The positive pole 7 and the negative pole 9 of each battery 5 are formed with screw grooves for screwing nuts 13 .

Both electrode surfaces of the battery assembly 3 are respectively equipped with bus bar module structures 1 . The bus bar module structural part 1 is in the shape of a flat plate as a whole, and has: a plurality of first conductors 15, respectively connected to the electrode column of the overall positive pole (hereinafter referred to as the overall positive pole 17) and the electrode column of the overall negative pole (hereinafter referred to as the overall negative pole) of the battery assembly 3 Two second conductors 21a, 21b connected to the total negative pole 19) and a pair of third conductors 23a, 23b respectively connected to a group of adjacent positive poles 7a and negative poles 9a of the battery assembly 3, measure each A plurality of terminals 25 for voltage detection of the voltage of the battery 5, and a resin plate 27 holding the first conductor 15, the second conductor 21, the third conductor 23, and the terminal 25 for voltage detection, respectively.

The first conductor 15, the second conductors 21a, 21b, and the third conductors 23a, 23b are all metal plate materials. The first conductor 15 is provided with a pair of insertion holes for respectively penetrating the positive pole 7 and the negative pole 9 of the adjacent batteries 5 . The second conductors 21a, 21b are respectively provided with flat electrical contact portions 29a, 29b, and crimping portions 33a, 33b to which high voltage cables 31a, 31b are crimped. The electrical contact portions 29a, 29b are formed with insertion holes for passing through the overall positive pole 17 or the overall negative pole 19 . The third conductors 23a, 23b are respectively provided with flat electrical contact portions 35a, 35b, and a crimping portion 39 for crimping the high-voltage cable 37 . The electrical contact portions 35a, 35b are respectively formed with insertion holes for passing through the positive pole 7 or the negative pole 9 .

By making the electrical contact portion 29a of one second conductor 21a longer than the electrical contact portion 29b of the other second conductor 21b, the routing path of the high-voltage cable 31a connected to the second conductor 21a can be ensured. Each voltage detection terminal 25 is provided with a planar electrical contact portion 41 that comes into contact with the first conductor 15 and a crimping portion 43 that crimps the voltage detection line. The electrical contact portion 41 is formed with an insertion hole for passing through the positive pole 7 or the negative pole 9 .

As shown in FIG. 1 , the resin plate 27 has a plurality of first accommodation portions 45 for accommodating the first conductor 15 and the electrical contact portion 41 of the voltage detection terminal 25, and two second accommodation portions 45 for accommodating the second conductors 21a and 21b respectively. The housing portions 47a, 47b, the pair of third housing portions 49a, 49b housing the third conductors 23a, 23b, and the groove-shaped wire routing path 51 housing the voltage detection line. The first housing portion 45 is aligned with the wire housing portion 53 for housing the crimping portion 43 of the voltage detection terminal 25 and the voltage detection wire crimped by the crimping portion 43 .

The arrangement of the receiving parts corresponds to the arrangement of the electrodes of the battery assembly 3 , and adjacent receiving parts are connected to each other by hinges 55 . The second housing portions 47 a and 47 b are arranged at both ends of the resin plate 27 in the longitudinal direction (left-right direction in FIG. 3 ), respectively. The third housing portions 49 a and 49 b are arranged substantially in the center in the longitudinal direction of the resin plate 27 and adjacent to each other. A plurality of first storage parts 45 are arranged so as to fill between the second storage parts 47a, 47b and the third storage parts 49a, 49b. It should be noted that the positions of the third receiving portions 49a, 49b are not limited to the above positions, as long as they are basically located at both ends of the resin plate.

Each housing portion is surrounded and formed by a substantially rectangular peripheral wall 57 standing upright in a frame shape from the bottom wall of the resin plate 27 . The bottom wall 59 surrounded by the peripheral wall 57 is provided with an electrode through hole 61 for penetrating each electrode. Each conductor accommodated in each accommodation part is grasped in each accommodation part by being locked with the claw part 63 protruding from the peripheral wall 57 of each accommodation part.

The wire routing passage 51 is formed between the groove bottom 65 and the pair of side walls 67 and is formed along the longitudinal direction of the resin plate 27 . The wire routing passage 51 is connected to the first housing portion 45 via the wire housing portion 53 and is covered by an openable and closable protective cover 69 connected to the resin plate 27 .

The pair of third conductors 23a, 23b are respectively connected to a connector via a high-voltage cable 37, and a detachable service plug (service plug) 71 is connected to the connector. Since the maintenance plug 71 is installed on the connecting piece, the conduction between the pair of third conductors 23a and 23b is realized through a pair of high-voltage cables 37 . And when the maintenance plug 71 is separated from the connector, the pair of third conductors 23a, 23b will be disconnected. According to this structure, by removing the maintenance plug 71 for maintenance when performing maintenance on the battery assembly 3 and electronic equipment serving as a load of the battery assembly 3, the power supply circuit of the battery assembly 3 can be cut off to ensure the safety of the work. .

An electronic unit 73 for controlling the battery assembly 3 is provided at one end of the battery assembly 3 in the stacking direction of the batteries 5 , for example. The electronic unit 73 is configured by accommodating equipment and the like for controlling the output of the power supply device and the like in a housing. The high-voltage cable 31a connected to the second conductor 21a is supported by the resin plate 27, and is laid in parallel with the wire routing passage 51 along the long side direction of the resin plate 27, and is then connected to the electronic unit 73 together with the high-voltage cable 31b connected to the second conductor 21b. connect.

Next, the characteristic structure of the bus bar module structure 1 according to this embodiment will be described with reference to the drawings.

As shown in FIG. 1 , the bus bar module structure 1 of the present embodiment can be divided into two parts, a resin plate 27 a and a resin plate 27 b. One resin plate 27a and the other resin plate 27b are divided along a set of housing portions, that is, between the first housing portion 45 and the third housing portion 49a, and can be placed on the groove bottom 65 of the wire routing passage 51 respectively. interconnected.

As shown in FIG. 2 , on the surface of the resin plate 27 b facing the resin plate 27 a, a convex groove bottom 65 (hereinafter referred to as a convex portion 75 ) is formed, and on the surface of the resin plate 27 a facing the resin plate 27 b , a concave groove bottom 65 (hereinafter referred to as a concave portion 77 ) capable of locking the convex portion 75 is formed.

A pair of grooves 79 respectively extending in the thickness direction (direction perpendicular to the protruding direction of the protruding part 75 ) are formed on both side surfaces of the protruding part 75 extending along the protruding direction of the protruding part 75 , and a pair of groove parts 79 are formed in the concave part 77 which can respectively A pair of protrusions 81 fitted into the pair of grooves 79 . On the resin plate 27b, a pair of protruding first protruding portions 83 are formed at intervals from both side surfaces extending in the protruding direction of the protruding portion 75, and a pair of protruding first protruding portions 83 are formed on the resin plate 27a to fit into the protruding portion 75. A pair of second protrusions 85 between the protrusions 83 . Thus, when the protrusion 75 is inserted from the thickness direction of the recess 77, the protrusion 81 of the recess 77 fits into the groove 79 of the protrusion 75, and the pair of second protrusions 85 fits into the protrusion 75 and one of the protrusions. Between the first protrusions 83, the two resin plates 27a and 27b are connected to each other.

As shown in FIG. 4 , the entire resin plate 27 ( 27 a , 27 b ) is covered with an insulating cover 87 ( 87 a , 87 b ) that can be freely opened and closed. The insulating cover 87 is connected to the resin plate 27 via a hinge (not shown) formed on the resin plate 27, and is provided on each of the resin plates 27a, 27b. The insulating cover 87b connected to the resin plate 27b is formed with a U-shaped cutout 89 for leading out the high-voltage cables 37a, 37b connected to the pair of third conductors 23a, 23b and the high-voltage cable 31b connected to the second conductor 21b, respectively, and for The square cutout 91 leading out the high voltage cable 31a connected to the second conductor 21a.

As shown in FIG. 8, on the resin plate 27b, a part of the peripheral walls 57 of the pair of third housing portions 49a, 49b that face each other are extended in the height direction (upward direction in FIG. 8) to form a pair of extended walls. 93. In addition, as shown in FIG. 9 , ribs 95 that can enter between the pair of extension walls 93 when insulating cover 87 covers resin plate 27b protrude from the surface of the insulating cover that faces resin plate 27b.

Thus, as shown in FIG. 10, by making the rib 95 enter between the pair of extension walls 93 when the insulating cover 87 covers the resin plate 27b, the gap between the opposing peripheral walls 57 of the pair of third housing portions 49a, 49b A part of the room is completely separated in the height direction. This can increase the insulating protection area between the third conductors 23a, 23b accommodated in the pair of third housing portions 49a, 49b, thereby preventing a short circuit between the third conductors 23a, 23b.

According to the present embodiment, the resin plate 27 is divided into two, and the divided resin plates 27a and 27b can be connected. Therefore, even if the number of batteries in the battery assembly 3 increases or decreases due to changes in the specifications of the power supply device, etc., only a plurality of resin plates 27a having different sizes (the number of first housing portions 45, etc.) By connecting the resin plate 27a of a predetermined size to the resin plate 27b, it is possible to respond to an increase or decrease in the number of batteries, and it is possible to quickly respond to a design change or the like.

It should be noted that when the newly prepared resin plate 27a is connected to the existing resin plate 27b according to the increase or decrease in the number of batteries, the position of the pair of third conductors 23a, 23b will deviate from the connected resin plate 27. In the case of the central portion in the longitudinal direction. However, as long as the power supply circuit of the battery assembly 3 can be cut off by the maintenance plug 71, even if the positions of the third conductors 23a, 23b deviate to some extent, there will be no problem.

In addition, since the bus bar module structure 1 is composed of two parts as a whole, the number of parts can be reduced compared with, for example, a case where a module is formed by holding only the pair of third conductors 23 on a dedicated resin plate.

In addition, through the mutual connection of the divided two resin plates 27a, 27b, all the conductors of the first conductor 15, the second conductor 21, and the third conductor 23 can be held, and four high-voltage cables 31a, 31b, 37a, 37b are all lead-out bus bar module structural parts. Therefore, when connecting each conductor and each electrode, the operation of installing the connected bus bar module structure 1 to the battery assembly 3 can be completed with only one operation. After the installation work is completed, only by screwing the nut 13 The assembly can be completed by working on each electrode. Therefore, as a result, work man-hours can be reduced, and workability in connecting each electrode and each conductor can be improved.

Moreover, according to this embodiment, the recessed part 77 and the convex part 75 which connect resin plates 27a and 27b are each formed as a part of the groove bottom part 65 of the electric wire wiring passage 51. As shown in FIG. Therefore, the increase in size of the bus bar module structure 1 can be prevented, and the degree of freedom in the design of the bus bar module structure 1 can be improved.

In addition, according to the present embodiment, since the connector to which the maintenance plug 71 is attached is not fixed to the battery assembly 3, but is in a floating state with respect to the third conductors 23a, 23b via the high voltage cables 37a, 37b. Therefore, it is not necessary to separately provide a structure for fixing the connector, and the structure of the battery assembly 3 can be simplified. It should be noted that the connecting member may also be fixed to the battery assembly, although this will complicate the structure.

Above, the embodiment of the present invention has been described in detail with reference to the drawings, but the above-mentioned embodiment is only an illustration of the present invention, and the present invention is not limited to the structure of the above-mentioned embodiment. Design changes and the like within the range not departing from the gist of the present invention should be included in the scope of the present invention.

For example, in this embodiment, the example in which the resin plate 27 is divided along between the first storage portion 45 and the third storage portion 49a has been described, but it may be configured to be divisible along other storage portions.

In addition, in the present embodiment, a pair of extension walls 93 are formed by extending the opposing peripheral walls 57 of the pair of third housing portions 49a, 49b, and the ribs 95 of the insulating cover 87 are inserted into the pair of extension walls. 93 has been described as an example, but for example, instead of forming the extension wall 93, the rib 95 may be extended so as to enter between the opposing peripheral walls 57.

Claims (4)

1. a busbar modular structure part, is characterized in that,

Between any one group of adjacent positive in the cell assembly that the positive pole of multiple batteries is connected by conductor series connection with negative pole with the positive pole of negative pole alternate configurations and adjacent cell and negative pole, can be connected and disconnect with maintenance plug,

Described busbar modular structure part has:

Be connected to multiple the first conductors between adjacent positive and the negative pole of described cell assembly;

Two the second conductors that are connected with total positive pole and total negative pole of described cell assembly respectively;

Interconnect with described maintenance plug, and be connected to two the 3rd conductors of described one group of adjacent positive and negative pole; With

The resin plate that the each resettlement section that makes to contain respectively each described conductor forms in the mode matching with the arrangement of multiple electrodes of described cell assembly,

Described resin plate is along divided between any one group of adjacent resettlement section,

And this divided resin plate can interconnect.

2. busbar modular structure part as claimed in claim 1, is characterized in that,

Among divided side's resin plate and the opposing party's resin plate in described resin plate, one side's resin plate be formed with protuberance with the opposed surface of the opposing party's resin plate, being formed with an opposed surface of side's resin plate of the opposing party's resin plate can be by the recess of described protuberance engagement.

3. busbar modular structure part as claimed in claim 2, is characterized in that,

Described busbar modular structure part also has:

Respectively with described multiple the first conductor butts and be contained in multiple voltage detecting terminals of described resettlement section; With

Many electric wires that are connected with terminal with each described voltage detecting respectively,

Described resin plate is provided with the electric wire of the groove shape for accommodating described many electric wires and lays path,

Described protuberance and described recess are formed at the trench bottom of described electric wire laying path.

4. the busbar modular structure part as described in any one in claim 1～3, is characterized in that,

Two adjacent resettlement sections of accommodating described the 3rd conductor are surrounded and are formed by the perisporium that is erected into frame shape from the bearing-surface of described the 3rd conductor institute butt respectively,

Described resin plate has the insulating lid that can free-open-close be covered in the opening of described perisporium,

Described insulating lid is provided with fin, and in the time that described insulating lid covers described perisporium, described fin can enter the gap between the described perisporium of adjacent described resettlement section.

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