JP6135473B2 - Battery pack - Google Patents

Description

  The present invention includes a battery stack, a bus bar module that connects terminals of each battery cell, a battery state detection unit that detects the state of the battery cell, and a smoke exhaust duct that discharges fuming gas when the battery cell is abnormal. The battery state detection unit relates to a battery pack disposed on the upper part of the battery stack. In particular, the present invention relates to a vehicle-mounted battery pack that stores power for traveling.

  Conventionally, the battery state monitoring system described in Patent Document 1 is known. This system includes a battery state notification unit that can be easily diverted between battery packs having different numbers of battery cells, a bus bar module and an assembled battery having the battery state notification unit, and a battery state monitoring system having the battery state notification unit Is to provide.

  For this purpose, the battery state notification unit is provided with a plurality of subunits corresponding to a predetermined number of battery cells. And these subunits are producing | generating the battery status information containing the digital signal which shows the state of the battery cell corresponding to this subunit. In addition, the generated battery state is transmitted to an external battery state monitoring unit.

  The battery state information indicating the state of the battery cell corresponding to the above-mentioned subunit is determined according to the cell voltage signal corresponding to the inter-electrode voltage output by the bus bar and the terminal fitting, and the voltage output from the temperature sensor unit. It is generated based on the cell temperature signal. In addition, a battery voltage change sensing terminal is used as a terminal leg (bracket) that supports a subunit (also referred to as a satellite substrate). The terminal leg is fixed on the bus bar module. Patent Document 1 does not describe a smoke exhaust duct.

JP2013-30312A

  In general, the battery stack is provided with a smoke exhaust duct for exhausting the fuming gas to a safe space such as the outside of the passenger compartment when the battery emits smoke during an abnormality such as battery overcharge. When the bus bar module, the smoke exhaust duct, and the subunit are arranged on the basis of the idea of the above-mentioned Patent Document 1, there is a problem that the size is increased with respect to the overlapping direction (battery height direction) of these parts and it is difficult to mount. is there. Moreover, in patent document 1, a bus-bar module and a subunit are comprised as a separate component, and there exists a subject that each component is disjoint and it is difficult to assemble | attach.

  Furthermore, while it is necessary to capture a very small battery voltage change, in Patent Document 1, a battery voltage change sensing terminal is used as a terminal leg for supporting a subunit. For this reason, when the dimensional variation between cell terminals accompanying a temperature change or charge / discharge occurs, reliability is lacking due to concentration of stress on the terminal legs or the substrate.

  FIG. 9 is a non-known battery pack considered in the process of devising the present invention. The enlargement will be described with reference to FIG. The electrode terminal 1 protrudes on one side which is the upper part of the battery stack 30 which is an aggregate of the battery cells 3. The bus bar 4 connecting the electrode terminal 1 is held in a bus bar case 5. The left and right bus bar cases 5 are connected to form a bus bar module 6 together with the bus bar 4. A smoke exhaust duct 70 is provided between the electrode terminals 1, and an electric circuit such as a battery state detector 8 is mounted on the smoke exhaust duct 70.

  However, the battery pack considered in the process of devising the present invention firstly requires a separate member that constitutes the smoke exhaust duct 70 and a member that constitutes the bus bar module 6, which increases the number of parts and makes it complicated. Become. In addition, since the case 34 for holding the electric circuit board 31 such as a glass epoxy board is necessary for the electric circuit such as the battery state detection unit 8 separately from the smoke exhaust duct 70, the number of parts is increased and complicated in this respect as well. Become. In addition, since a plurality of components are simply stacked on the cuboid smoke exhaust duct 70 having a required cross-sectional area, the height dimension H10 is increased.

  On the other hand, FIG. 10 shows another battery pack generally used conventionally. In order to solve the above-described height problem, a battery management unit having functions of a battery state detection unit and a battery control unit at a position away from the vehicle power supply device 101 that is an assembly of the battery packs 100 ( BMU) 32 is provided. And the wiring part 33 connects between the battery packs 100 and between the vehicle power supply device 101 and the battery management unit 32. In this case, the number of wires constituting the wiring portion 33 is required for the number of the battery cells 3, for example, 56 wires are required, and the wire harness becomes complicated and large in size and difficult to assemble.

  In view of the above problems, an object of the present invention is to provide a battery pack that has a simple structure and does not have a large height dimension.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

In order to achieve the above object, the present invention employs the following technical means. That is, in one aspect of the present invention, a plurality of battery cells (3) each including an electrode terminal (1) including a positive electrode terminal (1a) and a negative electrode terminal (1b) projecting from a battery case end (2) are provided. A battery cell holding resin portion (9) that is provided between adjacent battery cells (3) and holds the battery cells (3), and the electrode terminals (1) are arranged on one side of the plurality of battery cells (3). A battery stack (30) arranged so as to protrude to the side, a plurality of bus bars (4) including metal pieces respectively connected to the plus electrode terminal (1a) and the minus electrode terminal (1b), and a plurality of bus bars ( A bus bar case (5) for holding each of 4),
A smoke exhaust duct space (7) for discharging smoke from the battery cell (3) is formed on one side of the battery cell (3) between the positive electrode terminal (1a) and the negative electrode terminal (1b), A battery state detector (8) including an electric circuit mounted on one side of the smoke exhaust duct space (7) is provided and extends from the battery cell (3) side of the smoke exhaust duct space (7) to one side. The bottom of the wall-shaped protruding portion (9b) and the smoke exhaust duct space (7) are formed by the battery cell holding resin portion (9), and the positive electrode terminal (1a) side and the negative electrode terminal ( A bus bar case connecting portion (50) that forms a bus bar module (6) by connecting the bus bar cases (5) respectively arranged on the 1b) side, and the battery cell holding resin portion (9) Between the positive electrode terminal (1a) and the negative electrode terminal (1b) It has a pair of opposing wall-like protrusions (9b), and the smoke exhaust duct space (7) is formed including a pair of wall-like protrusions (9b) and a bus bar case connecting part (50). It is characterized by.

According to this invention, the wall-shaped protrusion and bottom extending from the battery cell (3) side to the one side of the smoke exhaust duct space (7) are formed by a part of the battery cell holding resin portion (9). Therefore, a part of the smoke exhaust duct space can also be used as a part of the battery cell holding resin part (9). Therefore, it is possible to provide a battery pack that has a simple structure and does not increase in height.

  Next, a part of the bottom surface on the opposite side to the one side of the bus bar case connecting portion (50) is formed as a protruding portion (50a) protruding into the smoke exhaust region in the smoke exhaust duct space (7). The bottom part on the opposite side of the projecting part (50a) is located on the opposite side of the positive electrode terminal (1a), the negative electrode terminal (1b) and the one end part (1t).

  According to this invention, while ensuring the minimum cross-sectional area required for the smoke exhaust space of the smoke exhaust duct space, utilizing the surplus space of the smoke exhaust duct space, the battery state detection mounted on one side of the bus bar case connecting portion The portion can be prevented from popping out to one side, and the height can be suppressed.

  In addition, the code | symbol in parentheses as described in a claim and said each means thru | or description is an example which shows the correspondence with the specific means as described in embodiment mentioned later easily, and limits the content of invention is not.

It is a top view of the battery pack which shows 1st Embodiment of this invention. It is a perspective view of the said battery pack. It is explanatory drawing explaining the lamination | stacking state of the battery cell seen from the arrow III direction of FIG. FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG. 1. It is a partial cross section figure which follows the arrow VV line of FIG. It is a partial cross section figure which follows the arrow VI-VI line of FIG. It is a schematic layout diagram of a vehicle power supply device having a plurality of battery packs showing a second embodiment of the present invention. It is a partial cross section figure which shows 3rd Embodiment of this invention and follows the arrow IV-IV line of FIG. It is a block diagram of the battery pack considered in the process of devising the present invention. It is a block diagram of the conventional battery pack.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where a part of the configuration is described in each form, the other forms described above can be applied to the other parts of the configuration.

  Not only combinations of parts that clearly indicate that the combination is possible in each embodiment, but also the embodiments are partially combined even if they are not clearly specified unless there is a problem with the combination. It is also possible.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 shows a battery pack 100 showing a first embodiment of the present invention. FIG. 2 also shows the battery pack 100. FIG. 3 shows the stacked state of the battery cells 3 as seen from the direction of arrow III in FIG. Further, FIG. 4 shows a partial cross-sectional shape along the line IV-IV in FIG.

  A plurality of battery cells 3 (FIG. 3) in which the electrode terminals 1 including the positive electrode terminal 1a and the negative electrode terminal 1b in FIG. 4 protrude from the battery case end 2 (FIG. 3) are arranged in a row as shown in FIG. Are listed. A configuration in which the plurality of battery cells 3 are arranged in series so that the electrode terminal 1 is on one side (for example, the top side) is called a battery stack 30 (FIG. 2).

  One side of the battery cell 3 has a plurality of bus bars 4 (FIG. 4) including metal pieces respectively connected to the plus electrode terminal 1a and the minus electrode terminal 1b. Each of the plurality of bus bars 4 is held by a synthetic resin bus bar case 5. In other words, the bus bar case 5 made of synthetic resin and having insulating characteristics wraps around each bus bar 4. Bus bar 4 includes copper plates connected to positive electrode terminal 1a and negative electrode terminal 1b of adjacent battery cells 3, respectively.

  The plurality of bus bar cases 5 are arranged in two rows as shown in FIG. 1 so as to enclose the rows of the positive electrode terminals 1 a and the negative electrode terminals 1 b of the battery cells 3. A set of a plurality of bus bar cases 5 are connected to each other by a bus bar case connecting portion 50 (FIG. 4) to constitute an integrated bus bar module 6. That is, the bus bar module 6 is composed of a set of the bus bar 4, the bus bar case 5 that holds each of the plurality of bus bars 4, and the bus bar case connecting portion 50 that connects the bus bar cases 5 arranged in the two rows. Has been.

  A smoke exhaust duct space 7 is provided on one side of the battery cell 3 between the plus electrode terminal 1a and the minus electrode terminal 1b and for discharging smoke from the battery cell 3. In FIG. 1, a bus bar case connecting portion 50 corresponding to the lid portion of the smoke exhaust duct space 7 can be seen.

  In this embodiment, there is not a duct part made of a dedicated resin member such as a smoke exhaust duct, but a part of the battery cell holding resin part (9, 9b1, 9b2) and the bus bar module as described later. Part (50) forms a smoke exhaust duct space 7.

  A pair of battery state detectors 8a and 8b (collectively referred to as battery state detectors) that also serve as at least a part of the lid on one side of the smoke exhaust duct space 7 and include an electric circuit that detects the state of the plurality of battery cells 3 8). The battery state detection unit 8 is an electric circuit serving as a subunit mounted on the bus bar case connection unit 50 that also serves as a substrate and a lid of the smoke exhaust duct space 7.

  This electric circuit detects the battery voltage and the battery temperature which are the state of the battery cell 3. This detection signal is sent via a wire harness (not shown) to the battery control unit 10 which is a higher-order unit. Therefore, at least a part of the lid portion on one side of the smoke exhaust duct space 7 is also served by the bus bar case connecting portion 50. In addition, a circuit board is provided in the battery state detection unit 8, and the case 34 that holds the circuit board and the bus bar case connection unit 50 are also used.

  A part of the bottom surface on the opposite side to the one side of the bus bar case connecting portion 50 protrudes into the smoke exhaust region in the smoke exhaust duct space 7 to form a protrusion 50a. The bottom of the protruding portion 50a opposite to one side is located on the opposite side of the one end portion 1t of the plus electrode terminal 1a and the minus electrode terminal 1b.

  Next, in FIG. 3, each battery cell 3 is housed and held in a recess 9 a in a battery cell holding resin portion 9 made of synthetic resin. Therefore, the battery cell holding resin portion 9 is interposed between the adjacent battery cells 3.

  As shown in FIG. 4, the battery state detection unit 8 is provided so as to cover one side which is the upper part of the smoke exhaust duct space 7. The bottom surface of the battery state detection unit 8 opposite to one side (the lower side in FIG. 4) is located on the opposite side of the positive electrode terminal 1a and the negative electrode terminal 1b and the one end 1t.

  In other words, when a virtual line Y41 connecting the pair of end portions 1t of the positive electrode terminal 1a and the negative electrode terminal 1b forming the battery connection portion is defined as shown in FIG. A part of the bottom surface of the battery state detection unit 8 is located on the side opposite to the side.

  As shown in FIG. 3, each battery cell 3 is housed in a concave portion 9 a of a battery cell holding resin portion 9 made of synthetic resin, and is stacked in the vertical direction of FIGS. 1 and 2. As shown in FIG. 4, the battery cell holding resin portion 9 has a first wall-like protruding portion 9 b 1 and a second wall-like protruding portion 9 b 2 (collectively referred to as a wall-like protruding portion 9 b) that face each other.

  This wall-like protrusion 9b constitutes a wall-like protrusion 9b on the left and right of FIG. Therefore, the wall-shaped protrusion 9b extending from the battery cell 3 side to the one side of the smoke exhaust duct space 7 and the bottom of the smoke exhaust duct space 7 are formed by the battery cell holding resin portion 9. That is, the battery cell holding resin part 9 has the wall-like protrusions 9b that constitute the left and right wall-like protrusions 9b of the smoke exhaust duct space 7 between the plus electrode terminal 1a and the minus electrode terminal 1b.

  Further, as a part of the bus bar module 6, the bus bar module 6 includes a bus bar case connecting portion 50. The bus bar case connecting portion 50 constitutes at least a part of the lid portion of the smoke exhaust duct space 7. The smoke exhaust duct space 7 is formed so as to be surrounded by the wall-like protruding portion 9 b and the bus bar case connecting portion 50.

  Thereby, the smoke exhaust duct space 7 is formed between the battery cell holding resin part 9 having the wall-like protruding part 9b and the bus bar case connecting part 50 which is provided in the bus bar module 6 and serves as a lid part. And the battery state detection part 8 is being fixed to the one side of the bus-bar case connection part 50 used as a cover part. And the bus-bar case connection part 50 used as this cover part contains the hard synthetic resin which endures high temperature as a part of smoke exhaust duct space 7. FIG. Thereby, the bus bar case connecting portion 50 including the synthetic resin can also serve as the case 34 that holds the circuit board of the electric circuit mounted inside the battery state detecting portion 8.

  In addition, as shown in FIG. 4, the battery state detection unit 8 includes a first connector portion 8c1 serving as a connection portion for electrical wiring. At least a part of the first connector portion 8c1 of the battery state detection portion 8 is located on the opposite side of the positive electrode terminal 1a and the negative electrode terminal 1b on one end portion 1t (virtual line Y41). . That is, at least a part of the first connector portion 8c1 is located on the side opposite to the one side that is below the virtual line Y41.

  Further, as shown in FIGS. 1 and 2, the battery control unit 10 that manages the input and output of the battery stack 30 based on the state of the battery cell detected by the battery state detection unit 8 is provided at the approximate center of the battery stack 30. I have. The battery control unit 10 is located between the plus electrode terminal 1a and the minus electrode terminal 1b as shown in FIG.

  In other words, in FIG. 4, when a virtual line Y41 connecting the pair of end portions 1t of the plus electrode terminal 1a and the minus electrode terminal 1b is defined, the one side that is below the virtual line Y41 is opposite to the one side. A part of the circuit board which is the bottom surface of the battery control unit 10 is located.

  As described above, in the first embodiment, as a member for holding the circuit board (also referred to as a satellite board) of the battery state detection unit 8, the bus bar case connection unit serving as a component part of the lid of the smoke exhaust duct space 7. 50 is used. The satellite substrate is disposed in a space between the positive electrode terminal 1a and the negative electrode terminal 1b protruding from the battery cell 3.

  Further, at least a part of the satellite substrate is disposed at a position lower than the end portion 1 t of the electrode terminal 1. This also means that at least a part of the satellite substrate is arranged at a position lower than the upper surface end 5a (FIG. 4) of the bus bar case 5. Thereby, while ensuring the minimum cross-sectional area required for the smoke exhaust space in the smoke exhaust duct space 7, the surplus space in the smoke exhaust duct space 7 is utilized to determine the height of the battery pack 100, for example. As shown in the comparison with the configuration of 9, it is suppressed.

  Thus, in 1st Embodiment, the battery stack 30, the bus bar module 6 which connects between the electrode terminals 1 of each battery cell 3, the battery state detection part 8 which detects the state of the battery cell 3, and the battery cell And a smoke exhaust duct space 7 for discharging smoke gas at the time of abnormality.

  The battery state detection unit 8 is disposed on the battery stack 30 to constitute the battery pack 100. The bus bar module 6 includes a bus bar case 5 that holds the bus bar 4 connected to the positive electrode terminal 1 a and the negative electrode terminal 1 b of the battery cell 3, and a duct component that constitutes a part of the smoke exhaust duct space 7. I have. The duct constituent part includes a bus bar case connecting part 50 that is provided in the bus bar module 6 and is a constituent part of the lid part of the smoke exhaust duct space 7.

  Furthermore, when a virtual line Y41 that connects the end portions 1t of the positive electrode terminal 1a and the negative electrode terminal 1b of the battery connection portion in the protruding direction of the electrode terminal 1 of the battery cell 3 is defined, at least one of the battery state detection units 8 is defined. The part is located between the virtual line Y41 and the battery case end 2.

  Furthermore, another structure is demonstrated using FIG. 5 and FIG. FIG. 5 shows a partial configuration along the line VV in FIG. FIG. 6 shows a partial configuration along the arrow VI-VI line of FIG. As shown in FIGS. 5 and 6, the central portion of the battery control unit 10 also has a protruding portion 50 a protruding into the smoke exhaust region in the smoke exhaust duct space 7. Moreover, the bus bar case connection part 50 which is a structure part of the cover part of the one side of the smoke exhaust duct space 7 is provided. A part of the bus bar case connecting portion 50, which is a constituent part of the lid portion of the smoke exhaust duct space 7, forms a protrusion 50 a and protrudes into the smoke exhaust region in the smoke exhaust duct space 7.

(Operational effects of the first embodiment)
In the first embodiment, the battery pack 100 includes the battery cell 3, the battery stack 30, the bus bar module 6, the smoke exhaust duct space 7, and the battery state detection unit 8.

  In the battery cell 3, electrode terminals 1 including a positive electrode terminal 1 a and a negative electrode terminal 1 b protrude from the battery case end 2. The battery stack 30 is configured by arranging a plurality of battery cells 3 in series so that the electrode terminal 1 is on one side.

  The bus bar module 6 includes a bus bar 4, bus bar cases 5 arranged in two rows on both sides as shown in FIG. 1, and a bus bar case connecting portion 50 that connects the bus bar cases 5 on both sides. Bus bar 4 includes metal pieces connected to positive electrode terminal 1a and negative electrode terminal 1b, respectively. The bus bar case 5 holds each of the plurality of bus bars 4. The bus bar case connecting portion 50 connects the one bus bar case 5 and the other bus bar case 5 to each other.

  The smoke exhaust duct space 7 is disposed on one side of the battery cell 3 and between the positive electrode terminal 1a and the negative electrode terminal 1b, and discharges fuming gas from the battery cell 3. The battery state detection unit 8 is mounted on one side of the bus bar case connection unit 50 and includes an electric circuit that detects the state of the battery cell 3. Further, at least a part of the lid portion on one side of the smoke exhaust duct space 7 is also served by the bus bar case connecting portion 50.

  According to this, since at least a part of the lid portion on one side of the smoke exhaust duct space 7 is also served by the bus bar case connecting portion 50, the battery pack 100 is provided that has a simple structure and does not increase in height. can do.

  Next, a part of the bottom surface on the opposite side to the one side of the bus bar case connecting portion 50 protrudes into the smoke exhaust region in the smoke exhaust duct space 7 to form a protrusion 50a. And the bottom part on the opposite side to the one side of the protrusion part 50a is located in the other side rather than the edge part 1t of each one side of a plus electrode terminal and a minus electrode terminal.

  According to this, while ensuring the minimum cross-sectional area required for the smoke exhaust space of the smoke exhaust duct space 7, the surplus space of the smoke exhaust duct space 7 is utilized to be mounted on one side of the bus bar case connecting portion 50. It is possible to suppress the battery state detection unit 8 from popping out to one side. Therefore, the height of the battery pack 100 can be suppressed. Next, a circuit board is provided in the battery state detection unit 8, and at least a part of the case 34 that holds the circuit board also serves as the bus bar case connection unit 50.

  According to this, at least a part of the lid portion on one side of the smoke exhaust duct space 7 is also served by the bus bar case connecting portion 50. In addition, the case 34 holding the circuit board and the bus bar case connecting portion 50 are also used. Therefore, the number of parts can be reduced and the height dimension can be reduced. Moreover, the material which comprises the cover part of the smoke exhaust duct space 7 is convenient also at the point of intensity | strength or heat resistance also as a circuit board.

  Next, the electrode terminal 1 including the positive electrode terminal 1 a and the negative electrode terminal 1 b has a plurality of battery cells 3 protruding from the battery case end 2. The plurality of battery cells 3 are arranged in series so that the electrode terminals 1 are on one side, thereby forming a battery stack 30.

  A plurality of bus bars 4 including metal pieces connected to the plus electrode terminal 1a and the minus electrode terminal 1b, respectively, and a bus bar case 5 for holding the plurality of bus bars 4 are provided. A smoke exhaust duct space 7 that is disposed on one side of the battery cell 3 and between the plus electrode terminal 1a and the minus electrode terminal 1b and that discharges fuming gas from the battery cell 3 is provided.

  A battery state detection unit including an electric circuit is provided on one side of the lid on one side of the smoke exhaust duct space 7. At least a part of the lid portion on one side of the smoke exhaust duct space 7 protrudes into the smoke exhaust region in the smoke exhaust duct space 7 to form a protrusion 50a. Some components of the battery state detection unit 8 are provided in the protrusion 50a. The bottom of the protruding portion 50a opposite to one side is located on the opposite side of the positive electrode terminal 1a, the negative electrode terminal 1b, and the end 1t on one side.

  According to this, at least a part of the lid portion on one side of the smoke exhaust duct space 7 protrudes into the smoke exhaust region in the smoke exhaust duct space 7 to form a protrusion 50a. And some components of the battery state detection part 8 are provided in this protrusion part 50a. Therefore, it is possible to provide the battery pack 100 that can reduce the height dimension, reduce the number of parts, and have a simple structure.

  Next, the battery state detection unit 8 includes, for example, a first connector portion 8c1 (FIG. 4) that serves as a connection portion for electric wiring, and at least a part of the first connector portion 8c1 is a plus electrode terminal 1a and a minus electrode terminal 1b. And it is located in the other side rather than the edge part 1t of each one side. According to this, the height of the first connector portion 8c1 can be reduced.

  Next, a plurality of battery cells 3 are provided in which the electrode terminals 1 including the positive electrode terminal 1a and the negative electrode terminal 1b protrude from the battery case end 2 respectively. And the battery cell holding | maintenance resin part 9 provided between the adjacent battery cells 3 and holding the battery cell 3 is provided.

  A battery stack 30 is configured by arranging a plurality of battery cells 3 in series so that the electrode terminal 1 is on one side and arranging them in series. A plurality of bus bars 4 including metal pieces respectively connected to the plus electrode terminal 1a and the minus electrode terminal 1b, and a bus bar case 5 for holding each of the plurality of bus bars 4 are provided.

  A smoke exhaust duct space 7 which is disposed between the positive electrode terminal 1a and the negative electrode terminal 1b on one side of the battery cell 3 and exhausts fuming gas from the battery cell 3, and one side of the smoke exhaust duct space 7 And a battery state detector 8 including an electric circuit mounted on the battery. And the wall-shaped protrusion part 9b of the smoke exhaust duct space 7 extended from the battery cell 3 side to one side and the bottom part of the smoke exhaust duct space 7 are formed in the battery cell holding resin part 9.

  According to this, a part of the smoke exhaust duct space 7 can also be used as a part of the battery cell holding resin part 9, and the battery pack 100 that has a simple structure and does not increase in height can be provided. .

  Furthermore, a battery control unit 10 that manages input and output of the battery stack 30 based on the state of the battery cell 3 detected by the battery state detection unit 8 is provided on one side of the battery stack 30. The battery control unit 10 is located between the plus electrode terminal 1a and the minus electrode terminal 1b.

  According to this, since the battery control unit 10 is also mounted on one side of the battery stack 30, it is not necessary to mount the battery control unit 10 outside the battery stack 30 via the wiring unit, and the battery control unit 10 As a part of the battery pack 100, the entire physique can be reduced.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof is omitted, and different configurations will be described. In addition, about 2nd Embodiment or less, the same code | symbol as 1st Embodiment shows the same structure, Comprising: The description which precedes is used.

  FIG. 7 shows a schematic arrangement of the vehicle power supply device 101 including a set of a plurality of battery packs 100 showing the second embodiment of the present invention. In the first embodiment, two battery state detection units 8 are installed in the battery pack 100. In the second embodiment, a single battery state detection unit 8 is installed in each battery pack 100. doing. Similarly to the first embodiment, the vehicle power supply device 101 is configured by a set of a plurality of battery packs 100.

  In addition, a battery control unit 10 is configured in one battery pack 100 in the vehicle power supply device 101. The battery state detection unit 8 collects information on the temperature and voltage of each battery cell 3 via the first wiring 11. The battery control unit 10 collects information from the battery state detection unit 8 through the second wiring 12 and manages the entire vehicle power supply device 101. In the second embodiment shown in FIG. 7, the wire harness is simplified and the assembly is easy as compared with the battery pack generally adopted in FIG.

(Third embodiment)
Next, a third embodiment of the present invention will be described. A different part from above-described embodiment is demonstrated. FIG. 8 shows a third embodiment of the present invention. In FIG. 8, a plurality of battery cells 3 are provided in which electrode terminals 1 including a positive electrode terminal 1 a and a negative electrode terminal 1 b protrude from the battery case end 2. Note that the battery cell 3 is omitted in FIG.

  And it is provided similarly to FIG. 3 which the battery cell holding | maintenance resin part 9 provided between the adjacent battery cells 3 and hold | maintains the battery cell 3 uses. A plurality of battery cells 3 are arranged side by side so that the electrode terminals 1 are on one side, and the battery stack 30 is configured in the same manner as in FIG. A plurality of bus bars 4 including metal pieces respectively connected to the plus electrode terminal 1a and the minus electrode terminal 1b, and a bus bar case 5 for holding each of the plurality of bus bars 4 are provided. The bus bar case 5 holds each of the plurality of bus bars 4. The bus bar case connecting portion 50 connects the plus and minus bus bar cases 5 to each other.

  A smoke exhaust duct space 7 that is disposed between the positive electrode terminal 1a and the negative electrode terminal 1b on one side of the battery cell 3 and discharges smoke from the battery cell 3, and on one side of the smoke exhaust duct space 7 A battery state detection unit 8 including a mounted electric circuit is provided.

  A first wall-shaped protruding portion 9b1 that extends from one side of the smoke exhaust duct space 7 to the battery cell holding resin portion 9 side (the battery cell 3 side) and forms a wall portion of the smoke exhaust duct space 7, Two wall-shaped protrusions 9b2 are molded integrally with the bus bar case connecting portion 50. Further, the bottom portion of the smoke exhaust duct space 7 is formed by the battery cell holding resin portion 9. As a result, a smoke exhaust duct space 7 is provided on one side of the battery cell 3 and disposed between the plus electrode terminal 1a and the minus electrode terminal 1b to discharge smoke from the battery cell 3. Further, a battery state detection unit 8 including an electric circuit mounted on one side of the bus bar case connection unit 50 is provided.

  The third embodiment is different from the first embodiment in that the first wall-like projecting portion 9b1 and the second wall-like projecting portion 9b2 of the smoke exhaust duct space 7 are formed integrally with the bus bar case connecting portion 50. It is a point. Since the bus bar case connecting part 50 constitutes the lid part of the smoke exhaust duct space 7, the heat resistant material constituting the left and right first wall-like projecting parts 9b1 and the second wall-like projecting part 9b2 of the smoke exhaust duct space 7 Also suitable.

  According to this, the 1st wall-like protrusion part 9b1 and the 2nd wall-like protrusion part 9b2 which comprise the wall part of the smoke exhaust duct space 7 are integrally formed with the bus-bar case connection part 50, and smoke exhaust duct space 7 is formed by a part of the battery cell holding resin portion 9. Therefore, it is possible to provide a battery pack in which a part of the smoke exhaust duct space 7 can be shared by a part of the bus bar case connecting part 50 and the battery cell holding resin part 9, and the structure is simple and the height dimension is not increased. Can do.

(Other embodiments)
In the above embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. It is. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  The present invention has a preferable structure for a vehicle power supply device mounted in a lower part of a trunk room of a vehicle in which a reduction in space in the height direction of the mounting space is required, but the battery pack of the power supply device for other uses Can be used.

  In the above embodiment, the bus bar case connecting portion 50 corresponding to the lid portion of the smoke exhaust duct space 7 is shared with the electric circuit board, but this is not essential. The substrate may be configured as a separate member, and the battery state detection unit 8 or the battery control unit 10 including the substrate of the separate member may be supported by the bus bar case connection unit 50 corresponding to the lid portion of the smoke exhaust duct space 7.

  In the above embodiment, there is no duct part made of a dedicated resin member such as a smoke exhaust duct, and a smoke exhaust duct space is formed by a part of the battery cell holding resin part and a part of the bus bar module. . That is, there is no dedicated resin member constituting the smoke exhaust duct space. However, there may be a dedicated resin member that constitutes the smoke exhaust duct space in part.

DESCRIPTION OF SYMBOLS 1 Electrode terminal 2 Battery case edge part 3 Battery cell 4 Bus bar 5 Bus bar case 6 Bus bar module 7 Smoke duct space 8 Battery state detection part 30 Battery stack 50 Bus bar case connection part

Claims (5)

The electrode terminal (1) including the positive electrode terminal (1a) and the negative electrode terminal (1b) has a plurality of battery cells (3) protruding from the battery case end (2), and the adjacent battery cells ( 3) having a battery cell holding resin portion (9) for holding the battery cell (3), the electrode terminals (1) projecting to one side of the plurality of battery cells (3). the average solid cell stack (30),
A plurality of bus bars (4) including metal pieces respectively connected to the positive electrode terminal (1a) and the negative electrode terminal (1b);
Includes a bus bar case (5) for holding each of the plurality of bus bars (4),
A smoke exhaust duct space (7) for discharging smoke from the battery cell (3) on the one side of the battery cell (3) and between the positive electrode terminal (1a) and the negative electrode terminal (1b). ) Is formed,
A battery state detector (8) including an electric circuit mounted on the one side of the smoke exhaust duct space (7 ) is provided;
The wall-shaped protrusion (9b) extending from the battery cell (3) side to the one side of the smoke exhaust duct space (7) and the bottom of the smoke exhaust duct space (7) are the battery cell holding resin. Part (9),
Further, the bus bar case (6) is formed by connecting the bus bar cases (5) disposed on the positive electrode terminal (1a) side and the negative electrode terminal (1b) side, respectively. A connecting portion (50) is provided;
The battery cell holding resin part (9) has a pair of wall-like protrusions (9b) facing each other between the positive electrode terminal (1a) and the negative electrode terminal (1b),
The smoke exhaust duct space (7) is formed to include a pair of the wall-like projecting portions (9b) and the bus bar case connecting portion (50) . A part of the bottom surface of the bus bar case connecting part (50) opposite to the one side is formed as a protruding part (50a) protruding into a smoke exhausting area in the smoke exhausting duct space (7),
The bottom portion on the opposite side of the protruding portion (50a) is located on the opposite side of the positive electrode terminal (1a), the negative electrode terminal (1b) and the respective one end portion (1t). The battery pack according to claim 1.   A circuit board is provided in the battery state detection part (8), and the case (34) for holding the circuit board is also used as the bus bar case connection part (50). 2. The battery pack according to 2. The battery state detection unit (8) includes a connector part (8c1) serving as a connection part for electrical wiring, and at least a part of the connector part (8c1) includes the positive electrode terminal (1a) and the negative electrode terminal (1b). 4. The battery pack according to claim 1, wherein the battery pack is located on the opposite side of the one end portion (1 t) with each other . Furthermore, a battery control unit (10) that manages input and output of the battery stack (30) based on the state of the battery cell (3) detected by the battery state detection unit (8) is provided with the battery stack (30). the one provided on the side of) the battery control unit (10), one of the claims 1 to 4, characterized in that located between the positive electrode terminal (1a) and the negative electrode terminal (1b) the battery pack according to an item or.

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