JP2015032391A - Battery set device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery set device capable of improving efficiency of battery state detection while suppressing reduction of battery state detection accuracy low, for example.SOLUTION: The battery set device comprises six or more batteries and a conductive member group. The conductive member group includes a plurality of first conductive members which are a plurality of series battery groups connecting the six or more batteries in series into a plurality of lines, and a pair of second conductive members connecting the plurality of series battery groups in parallel. In a part of the plurality of first conductive members, the batteries in the same order counted from the battery in which one of the pair of second conductive members are connected in parallel in two or more of the plurality of series battery groups.

Description

  Embodiments described herein relate generally to an assembled battery device.

  2. Description of the Related Art Conventionally, there is known an assembled battery device in which a plurality of batteries have a plurality of series battery rows connected in series by a conductive member, and the plurality of series battery rows are connected in parallel by a conductive member. As this type of assembled battery device, there is one that detects the voltage of a battery by detecting the voltage of a conductive member as an example of detection of the state of the battery. In this assembled battery device, the number of conductive members is the number of voltage detection locations.

JP 2013-37861 A

  In this type of battery, as an example, it is desired to improve the efficiency of battery status detection while suppressing a decrease in battery status detection accuracy.

  The assembled battery device of the embodiment includes six or more batteries and a conductive member group. The conductive member group includes a plurality of first conductive members in which a plurality of series batteries are connected by connecting the six or more batteries in series, and a pair of the plurality of series battery groups connected in parallel. A second conductive member, and a part of the plurality of first conductive members is a pair of the second conductive members in the two or more series battery groups of the plurality of series battery groups. The same number of the batteries counted from the battery provided with one of the conductive members was connected in parallel.

FIG. 1 is a diagram schematically illustrating an example of the configuration of the assembled battery device according to the first embodiment. FIG. 2 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the first embodiment. FIG. 3 is a perspective view illustrating an example of a battery cell in the assembled battery device according to the first embodiment. FIG. 4 is a plan view showing a power storage unit in the assembled battery device of the first comparative example. FIG. 5 is a plan view showing a power storage unit in the assembled battery device of the second comparative example. FIG. 6 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the second embodiment. FIG. 7 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the third embodiment. FIG. 8 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the fourth embodiment. FIG. 9 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the fifth embodiment. FIG. 10 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the sixth embodiment. FIG. 11 is a perspective view illustrating an example of a power storage unit in the assembled battery device according to the seventh embodiment. FIG. 12 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the seventh embodiment. FIG. 13 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the eighth embodiment. FIG. 14 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the ninth embodiment. FIG. 15 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the first modification of the ninth embodiment. FIG. 16 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the second modification of the ninth embodiment. FIG. 17 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the tenth embodiment. FIG. 18 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the first modification of the tenth embodiment. FIG. 19 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the second modification of the tenth embodiment. FIG. 20 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the third modification of the tenth embodiment. FIG. 21 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the eleventh embodiment. FIG. 22 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the first modification of the eleventh embodiment. FIG. 23 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the second modification example of the eleventh embodiment. FIG. 24 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the third modification of the eleventh embodiment. FIG. 25 is a plan view illustrating an example of a power storage unit in the assembled battery device according to the twelfth embodiment. FIG. 26 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the first modification example of the twelfth embodiment. FIG. 27 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the second modification example of the twelfth embodiment. FIG. 28 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the third modification example of the twelfth embodiment. FIG. 29 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the fourth modification example of the twelfth embodiment. FIG. 30 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the fifth modification of the twelfth embodiment. FIG. 31 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the sixth modification example of the twelfth embodiment. FIG. 32 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the seventh modification example of the twelfth embodiment. FIG. 33 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the eighth modification example of the twelfth embodiment. FIG. 34 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the ninth modification example of the twelfth embodiment. FIG. 35 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the tenth modification of the twelfth embodiment. FIG. 36 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the eleventh modification of the twelfth embodiment. FIG. 37 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the twelfth modification of the twelfth embodiment. FIG. 38 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the thirteenth modification of the twelfth embodiment. FIG. 39 is a plan view illustrating an example of the power storage unit in the assembled battery device according to the fourteenth modification of the twelfth embodiment.

  The following exemplary embodiments and modifications include similar components. Therefore, below, the same code | symbol is attached | subjected to the same component, and the overlapping description is abbreviate | omitted.

<First Embodiment>
FIG. 1 is a diagram schematically illustrating an example of the configuration of the assembled battery device 1 according to the present embodiment. As shown in FIG. 1, the assembled battery device 1 includes a power storage unit 2 and a detection unit 3 as an example.

  The assembled battery device 1 is installed in various devices, machines, facilities, and the like, and can be used as a power source for these various devices, machines, and facilities. For example, the assembled battery device 1 is used as a mobile power source such as a power source for an automobile or a bicycle (moving body), or as a stationary power source such as a power source for a POS (point of sales) system. Also used. Moreover, the assembled battery apparatus 1 shown by this embodiment can be mounted in various apparatuses etc. as a set which connected two or more in series or in parallel.

  FIG. 2 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 2, the power storage unit 2 includes a plurality (more than six in detail) of battery cells 5 (battery cells 5 a 1 to 5 e 4) that are electrically connected to each other by the conductive member group 4. As an example, it can be configured as a secondary battery (storage battery, rechargeable battery). Therefore, it can be said that the electrical storage part 2 is a battery module or a battery unit.

  Each of the battery cells 5 (battery, single cell) can be configured as a lithium ion secondary battery, for example. The battery cell 5 may be another secondary battery such as a nickel metal hydride battery, a nickel cadmium battery, or a lead storage battery. A lithium ion secondary battery is a type of non-aqueous electrolyte secondary battery, and lithium ions in the electrolyte are responsible for electrical conduction. Examples of the positive electrode material include lithium manganese composite oxide, lithium nickel composite oxide, lithium cobalt composite oxide, lithium nickel cobalt composite oxide, lithium manganese cobalt composite oxide, spinel type lithium manganese nickel composite oxide, and olivine structure. As the negative electrode material, for example, an oxide-based material such as lithium titanate (LTO), a carbonaceous material, a silicon-based material, or the like is used. Further, as an electrolyte (for example, an electrolytic solution), for example, a lithium salt such as a fluorine-based complex salt (for example, LiBF4, LiPF6) is blended, for example, ethylene carbonate, propylene carbonate, diethyl carbonate, ethyl methyl carbonate, dimethyl carbonate. These organic solvents are used alone or in combination.

  FIG. 3 is a perspective view showing an example of the battery cell 5 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 3, the battery cell 5 includes, as an example, a container 11, and a positive electrode part 12 (electrode terminal) and a negative electrode part 13 (electrode terminal) as a pair of electrode parts protruding from the container 11. Have. In the container 11, as an example, an electrode body and an electrolytic solution are accommodated. As an example, the electrode body can be formed by winding a positive electrode sheet and a negative electrode sheet, which are power generation elements, spirally through a separator. In addition, as an example, the electrode body can be formed by laminating a positive electrode sheet and a negative electrode sheet via a separator. A positive electrode portion 12 and a negative electrode portion 13 are connected to the positive electrode sheet and the negative electrode sheet of the electrode body, respectively.

  As an example, the container 11 is formed in a flat, substantially rectangular parallelepiped shape. The container 11 can be composed of, for example, a metal material or a synthetic resin material. Moreover, as an example, when the container 11 is comprised with an insulating material, the inner surface (surface) is provided with an insulating layer, for example. Moreover, as a metal material of the container 11, aluminum, aluminum alloy, stainless steel, etc. can be used, for example. Examples of the synthetic resin material for the container 11 include an insulating synthetic resin material (for example, modified PPE (polyphenylene ether), PFA (perfluoroalkoxyalkane, tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer). ) Etc.) can be used. Further, as the synthetic resin material of the container 11, a thermoplastic resin can be used. For example, PE, olefin resin such as PP and PMP, polyester resin such as PET, PBT and PEN, POM resin, PA6, Polyamide resins such as PA66 and PA12, crystalline resins such as PPS resin and LCP resin and their alloy resins, or PS, PC, PC / ABS, ABS, AS, modified PPE, PES, PEI, PSF, etc. Amorphous resins and their alloy resins can be used.

  As an example, the container 11 includes a rectangular top surface 11a, a bottom surface 11b opposite to the top surface 11a, and a cylindrical extending surface 11c (side surface) provided across the top surface 11a and the bottom surface 11b. Have.

  The positive electrode portion 12 and the negative electrode portion 13 are provided on the top surface 11a and protrude from the top surface 11a. The positive electrode portion 12 and the negative electrode portion 13 are arranged with an interval in the longitudinal direction of the top surface 11a. The positive electrode portion 12 and the negative electrode portion 13 are each made of a conductive material.

  In the present embodiment, as an example, as shown in FIG. 2, the plurality of battery cells 5 are arranged in a matrix. In the present embodiment, as an example, five battery rows 6A to 6E each including four battery cells 5 are arranged in parallel. The first battery row 6A is composed of battery cells 5a1 to 5a4. The second battery row 6B is composed of battery cells 5b1 to 5b4. The third battery row 6C is composed of battery cells 5c1 to 5c4. The fourth battery row 6D is composed of battery cells 5d1 to 5d4. The fifth battery row 6E is composed of battery cells 5e1 to 5e4. The battery cells 5 of the battery rows 6A to 6E are connected in series, and the battery rows 6A to 6E are connected in parallel. In the drawing, the X direction indicates the arrangement direction of the battery cells 5 in the battery rows 6A to 6E, and the Y direction indicates the arrangement direction of the plurality of battery rows 6A to 6E.

  In the present embodiment, as an example, as shown in FIG. 2, the conductive member group 4 includes a plurality of types of conductive members 21 to 23 (bus bars and couplers). These conductive members 21 to 23 are made of a conductive material. In the present embodiment, the conductive members 21 and 22 are examples of a plurality of first conductive members, and the conductive member 23 is an example of a second conductive member.

  The conductive member 21 (series conductive member) connects two battery cells 5 only in series. Specifically, the conductive member 21 includes a positive electrode portion 12 of one of the two battery cells 5 and a negative electrode portion 13 of the other of the two battery cells 5. The positive electrode portion 12 and the negative electrode portion 13 are electrically connected to each other. As an example, ten (plural) conductive members 21 are provided.

  The conductive member 22 (series-parallel conductive member) connects four or more, for example, ten battery cells 5 in series-parallel (series and parallel). Specifically, the number of the conductive members 22 is two or more, for example, the positive electrode portions 12 of the five battery cells 5, and two or more different from these battery cells 5, for example, the negative of the five battery cells 5. The positive electrode part 12 and the negative electrode part 13 are electrically connected to the electrode part 13. One conductive member 22 is provided as an example.

  The conductive member 23 (parallel conductive member) connects the plurality of battery cells 5 only in parallel. A pair (two) of the conductive members 23 are provided. Specifically, one of the pair of conductive members 23 is coupled to the positive electrode portions 12 of the plurality of battery cells 5 and electrically connects these positive electrode portions 12. The other of the pair of conductive members 23 is coupled to the negative electrode portion 13 of another plurality of battery cells 5 and electrically connects these negative electrode portions 13.

  In the present embodiment, as an example, the conductive members 21 and 22 connect a plurality of battery cells 5 in series to form a plurality of (for example, five) series battery groups 7A to 7E. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 to 5a4). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b4). The series battery group 7C is configured by a third battery row 6C (battery cells 5c1 to 5c4). The series battery group 7D is configured by a fourth battery row 6D (battery cells 5d1 to 5d4). The series battery group 7E includes a fifth battery row 6E (battery cells 5e1 to 5e4). The plurality of series battery groups 7 </ b> A to 7 </ b> E are connected in parallel by a pair of conductive members 23. As can be seen from the above, in this embodiment, a plurality of battery cells are arranged in a matrix in which a plurality of battery rows 6A to 6E having a plurality of battery cells 5 connected in series by conductive members 21 and 22 are arranged in parallel. 5 is arranged.

  In the present embodiment, each battery cell 5 is connected to another battery cell 5 by a conductive member 21. That is, in the present embodiment, each battery cell 5 includes at least one of the pair of positive electrode portions 12 and the negative electrode portion 13, for example, one of the positive electrode portions 12 or the negative electrode portions of the other battery cells 5 by the conductive member 21. The electrode part 13 is connected only in series.

  In the present embodiment, the conductive member 22 is a battery in which one of the pair of second conductive members 23 is provided in the two or more series battery groups 7A to 7E among the plurality of series battery groups 7A to 7E. The same battery cells 5 counted from the cell 5 are connected in parallel. As an example, the conductive member 22 includes second battery cells 5a2, 5b2, 5c2, 5d2, and 5e2 counted from the battery cells 5a1, 5b1, 5c1, 5d1, and 5e1 provided with the left conductive member 23 in FIG. In addition to being connected in parallel, the third battery cells 5a3, 5b3, 5c3, 5d3, and 5e3 counted from the battery cells 5a1, 5b1, 5c1, 5d1, and 5e1 are connected in parallel. Here, the same number of battery cells 5 are theoretically at the same potential.

  As can be seen from the above, in the present embodiment, in the conductive member group 4, the battery cells 5 are connected only in series between the conductive members 22 and 23 (a plurality of parallel connection portions) in which the battery cells 5 are connected in parallel. The conductive member 21 (series connection portion) is disposed, and the conductive members 22 and 23 are not adjacent to each other in the series direction (X direction) of the series battery groups 7A to 7E.

  In the present embodiment, as an example, the detection unit 3 (monitoring unit) illustrated in FIG. 1 is configured by an electronic circuit, and detects (measures and monitors) the voltage of the battery cell 5 as the state of the battery cell 5. . The detection unit 3 is connected to the conductive members 21 to 23 and detects a voltage between the positive electrode unit 12 and the negative electrode unit 13 of each battery cell 5 as a cell voltage. Specifically, the detection unit 3 has a detection terminal (not shown) in contact with each of the conductive members 21 to 23, and the conductive members 21 and 22 coupled to the positive electrode unit 12 of the battery cell 5 or 23 and a voltage between the conductive member 21, 22 or 23 coupled to the negative electrode portion 13 of the battery cell 5 is detected as a cell voltage. The detection terminal of the detection part 3 is contacting the contact part 4a (measurement point) of the electrically-conductive members 21-23 as an example. The contact portion 4a is preferably, for example, a surface portion of the conductive members 21 to 23 located in the central portion of each of the conductive members 21 to 23 or in the vicinity of the central portion. The state of the battery cell 5 detected by the detection unit 3 may be the temperature of the battery cell 5 or the like. Also in this case, the temperature measurement point may be the contact portion 4a of the conductive members 21-23. The detection unit 3 outputs information indicating the detected voltage of each battery cell 5 to the management device 9 (control device). That is, information indicating the voltage (state) of each battery cell 5 detected by the detection unit 3 is input from the detection unit 3 to the management device 9. The management device 9 performs control such as activation of the detection unit 3, management (status grasp) of the power storage unit 2 (battery cell 5), charge / discharge control of the power storage unit 2 (battery cell 5), and the like. The management apparatus 9 has a control part and a memory | storage part as an example. The control unit can be configured by, for example, an MPU (Micro Processing Unit) or the like. Further, the storage unit may be configured to include a ROM (Read Only Memory), an EEPROM (Electronically Erasable and Programmable Read Only Memory), a RAM (Random Access Memory), and the like. Note that the hardware configuration of the battery management device 9 is merely an example, and can be implemented with various modifications such as a chip or a package.

  In the assembled battery device 1 of the present embodiment having the above configuration, the number of voltage measurement points necessary for detecting the voltages of all the battery cells 5, that is, the number of contact portions 4a (the number of detection terminals of the detection portion 3). The number) is the same as the number of the conductive members 21 to 23 and is 13 places. In all the battery cells 5, at least one (specifically, one) of the positive electrode portion 12 and the negative electrode portion 13 is coupled to the conductive member 21. Thus, when at least one (specifically one) of the positive electrode portion 12 and the negative electrode portion 13 of each battery cell 5 is coupled to the conductive member 21, the positive electrode portion of each battery cell 5 is obtained. Since the voltage of at least one of 12 and the negative electrode part 13 can be detected individually, the voltage detection accuracy of the battery cell 5 is relatively high.

  Next, a comparative example will be described. FIG. 4 is a plan view showing the power storage unit 102 in the assembled battery device 101 of the first comparative example. As shown in FIG. 4, in the assembled battery device 101 of the first comparative example, the conductive member group 104 of the power storage unit 102 is different from the conductive member group 4 of the present embodiment. The conductive member group 104 of the first comparative example includes 15 conductive members 21 and a pair of conductive members 23, and does not have the conductive members 22. In the assembled battery device 101 of the first comparative example having such a configuration, the number of voltage measurement points necessary for detecting the voltages of all the battery cells 5, that is, the number of contact portions 4a, is determined by the conductive members 21 and 23. It is the same as the number of and 17 places. In all the battery cells 5, at least one of the positive electrode portion 12 and the negative electrode portion 13 is coupled to the conductive member 21. In the assembled battery device 101 of the first comparative example, since the voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of each battery cell 5 can be individually detected, the voltage detection accuracy of each battery cell 5 is High, but the number of voltage measurement points is relatively large.

  FIG. 5 is a plan view showing the power storage unit 202 in the assembled battery device 201 of the second comparative example. As shown in FIG. 5, in the assembled battery device 201 of the second comparative example, the conductive member group 204 of the power storage unit 202 is different from the conductive member group 4 of the present embodiment. The conductive member group 204 of the second comparative example includes three conductive members 22 and a pair of conductive members 23, and does not have the conductive member 21. In the assembled battery device 201 of the second comparative example having such a configuration, the number of voltage measurement points necessary for detecting the voltages of all the battery cells 5, that is, the number of contact portions 4a, is determined by the conductive members 22, 23. It is the same as the number of and is five places. There is no battery cell 5 in which at least one of the positive electrode portion 12 and the negative electrode portion 13 is coupled to the conductive member 21. In the assembled battery device 201 of the second comparative example, the number of voltage measurement points is relatively small, but the voltage measured at each battery measurement point is the average value of the voltages of five battery cells 5 connected in parallel. Therefore, the voltage detection accuracy of each battery 5 is relatively low. For this reason, for example, even when an abnormality occurs in one of the battery cells 5, it is difficult to detect the abnormality.

  In contrast to the first and second comparative examples, in the present embodiment, the battery cells 5 are connected by the conductive members 21 to 23, whereby the positive electrode portion 12 and the negative electrode portion of each battery cell 5 are connected. Since at least one of the voltages of 13 can be detected individually, the voltage detection accuracy of each battery cell 5 is high and the number of voltage measurement points is relatively small.

  As described above, in the present embodiment, the conductive member group 4 includes six or more battery cells 5 connected in series in a plurality of rows to form a plurality of series battery groups 7A to 7E, in series. And a pair of conductive members 23 in which the battery groups 7A to 7E are connected in parallel. And the conductive member 22 which is a part of the conductive members 21 and 22 is a pair of conductive members 23 in two or more (all as an example) series battery groups 7A to 7E of the series battery groups 7A to 7E. The battery cells 5 of the same number, counted from the battery cell 5 provided with one of these, were connected in parallel. Therefore, according to this embodiment, as an example, compared with the second comparative example, the battery cell 5 is compared with the first comparative example while suppressing a decrease in the detection accuracy of the status of the battery cell 5 to a low level. The efficiency of situation detection can be improved.

  Here, in the first comparative example, as the number of battery cells 5 increases, the load on the detection unit 3 increases due to the complexity of wiring for detecting the voltage of each battery cell 5 and the increase in the number of data. In the present embodiment, a pair of conductive members 22 among the conductive members 21 and 22 are paired in two or more (as an example, all) series battery groups 7A to 7E of the series battery groups 7A to 7E. Since the same battery cells 5 counted from the battery cell 5 provided with one of the conductive members 23 are connected in parallel, the wiring for detecting the voltage of each battery cell 5 is complicated and the number of data is increased. An increase in the load on the detection unit 3 due to the increase can be suppressed.

  In this embodiment, at least one of the pair of positive electrode portions 12 and negative electrode portions 13 of each battery cell 5 is electrically connected to the electrode portion (positive electrode portion 12 or negative electrode) of another battery cell 5 by the conductive member 22. Connected only in series with part 13). Therefore, according to the present embodiment, as an example, since the voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of each battery cell 5 can be individually detected, voltage abnormality is detected in each battery cell 5. When it occurs, it is easy to detect the abnormality.

<Second Embodiment>
FIG. 6 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 6, in this embodiment, the arrangement of the plurality of battery cells 5 is the same as that of the first embodiment, but the configuration of the conductive member group 4 connecting the plurality of battery cells 5 is the first embodiment. Different from form.

  In the present embodiment, the conductive member group 4 includes a plurality of conductive members 21, 22, 22 </ b> A, and 23. The conductive members 21, 22, 22A are examples of a plurality of first conductive members. As an example, the conductive member 22A (series-parallel conductive member) connects six battery cells 5 in series-parallel (series and parallel). Specifically, the conductive member 22 </ b> A is coupled to the positive electrode portions 12 of the three battery cells 5 and the negative electrode portions 13 of the three battery cells 5 different from these battery cells 5. The part 12 and the negative electrode part 13 are electrically connected.

  Moreover, in this embodiment, the battery cells 5 of the battery rows 6A and 6E located at both ends in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E in the plurality of battery rows 6A to 6E are a pair. At least one of the electrode parts (positive electrode part 12 and negative electrode part 13) is connected in series only with the electrode part (positive electrode part 12 or negative electrode part 13) of another battery cell 5 by the conductive member 21. Has been. With this configuration, in this embodiment, the detection unit 3 has the positive electrode portions 12 of the battery cells 5 of the battery rows 6A and 6E positioned at both ends in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E. And the voltage of at least one of the negative electrode part 13 can be detected separately.

  Moreover, in this embodiment, the battery cell 5 of battery row | line 6B-6D located in the other than the both ends in the parallel direction (Y direction) of several battery row | line | columns 6A-6E is electrically conductive member group 4 (conductive member 22, 22A, 23), each of the pair of electrode parts (positive electrode part 12 or negative electrode part 13) is connected in parallel with the electrode part (positive electrode part 12 or negative electrode part 13) of another battery cell 5. . In the present embodiment, the conductive members 22, 22A, 23 as a plurality of portions in which the battery cells 5 are connected in parallel are positioned next to each other in the series connection direction in the series battery groups 7A to 7E. With this configuration, in this embodiment, the battery cells 5b1 to 5b4, 5c1 to 5c4, and 5d1 to 5d4 that are a part of the plurality (six or more) of battery cells 5 are paired by the conductive member group 4 with a pair of electrode portions ( Each of the positive electrode part 12 and the negative electrode part 13) is connected in parallel with the electrode part (positive electrode part 12 or negative electrode part 13) of the other battery cell 5. In such a configuration, the detection unit 3 detects the voltages of the positive electrode unit 12 and the negative electrode unit 13 that are connected in parallel to the other battery cells 5 in the battery cells 5 of the battery rows 6B to 6D. The number of voltage detection locations (contact portions 4a) in the present embodiment is nine.

  As described above, in the present embodiment, the detection unit 3 includes the battery rows 6A, 6A to 6E located at both ends in the parallel direction (Y direction) of the battery rows 6A to 6E. The voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of the 6E battery cell 5 is individually detected. On the other hand, for the battery cells 5 of the battery rows 6B to 6D located at both ends other than the both ends in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E, the battery cells 5 in the state of being connected in parallel with other battery cells 5 The detection unit 3 detects the voltages of the electrode unit 12 and the negative electrode unit 13. That is, in the present embodiment, the battery row 6A located at both ends (outside) in the parallel direction (Y direction) of the battery rows 6A to 6E that is relatively susceptible to the environmental temperature around the assembled battery device 1. , 6E, the voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 is individually detected. In addition, the battery rows 6B to 6D that are relatively not easily affected by the ambient temperature around the assembled battery device 1 and are located on the other side (inside) of the plurality of battery rows 6A to 6E in the parallel direction (Y direction). For the battery cell 5, the voltages of the positive electrode portion 12 and the negative electrode portion 13 that are connected in parallel with the other battery cells 5 are detected.

  Here, for example, when the assembled battery device 1 is used in a low temperature environment, a temperature difference occurs in the power storage unit 2 due to heat generated by the battery cells 5, but both ends of the battery rows 6A to 6E in the parallel direction. The battery cells 5 of the battery rows 6A and 6E located in the battery row 6A and 6E may have a lower temperature than the battery rows 6B to 6D located outside the both ends in the parallel direction of the battery rows 6A to 6E. For this reason, the battery cells 5 of the battery rows 6A and 6E have a larger internal resistance than the battery cells 5 of the battery rows 6B to 6D, and as a result, compared with the battery cells 5 of the battery rows 6B to 6D. The voltage change may be large. On the other hand, in this embodiment, the positive electrode portion 12 and the negative electrode portion of the battery cells 5 of the battery rows 6A and 6E positioned at both ends in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E. Since at least one of the voltages 13 is individually detected, the assembled battery device 1 can be used while maintaining the performance of the assembled battery device 1 even in a configuration with relatively few overall voltage measurement points.

<Third Embodiment>
FIG. 7 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 7, in this embodiment, the arrangement of the plurality of battery cells 5 is the same as that in the first embodiment, but the configuration of the conductive member group 4 connecting the plurality of battery cells 5 is the first embodiment. Different from form.

  In the present embodiment, the conductive member group 4 includes a plurality of conductive members 21, 22, 22 </ b> B, and 23. The conductive members 21, 22, 22B are an example of a plurality of first conductive members. As an example, the conductive member 22B (series-parallel conductive member) connects four battery cells 5 in series-parallel (series and parallel). Specifically, the conductive member 22 </ b> B is coupled to the positive electrode portions 12 of the two battery cells 5 and the negative electrode portions 13 of the two battery cells 5 other than the battery cells 5. The part 12 and the negative electrode part 13 are electrically connected.

  Moreover, in this embodiment, each battery cell 5 of battery row 6A, 6E located in the both ends in the parallel direction of these battery row | line | column 6A-6E in several battery row | line | column 6A-6E is the electrically-conductive member group 4. Each of the pair of electrode portions (positive electrode portion 12 and negative electrode portion 13) is in parallel with the electrode portion (positive electrode portion 12 or negative electrode portion 13) of another battery cell 5 by (conductive members 22, 22B, 23). It is connected to the. In the present embodiment, the conductive members 22, 22B, 23 as a plurality of portions in which the battery cells 5 are connected in parallel are positioned next to each other in the series connection direction in the series battery groups 7A to 7E. Specifically, the conductive member 22 is positioned between the pair of conductive members 23 and the conductive member 22B is positioned between the conductive members 22 and 23 in the series connection direction in the series battery groups 7A to 7E. With this configuration, in this embodiment, battery cells 5a1 to 5a4, 5b1 to 5b4, 5d1 to 5d4, and 5e1 to 5e4, which are a part of a plurality (six or more) of battery cells 5, are paired by the conductive member group 4. Each of the electrode parts (positive electrode part 12 and negative electrode part 13) is connected in parallel with the electrode part (positive electrode part 12 or negative electrode part 13) of another battery cell 5. In such a configuration, the detection unit 3 detects the voltages of the positive electrode unit 12 and the negative electrode unit 13 that are connected in parallel to the other battery cells 5 in the battery cells 5 of the battery arrays 6A, 6B, 6D, and 6E. To do. The number of voltage detection locations (contact portions 4a) in the present embodiment is nine.

  Moreover, in this embodiment, each battery cell 5 of the said battery row | line 6C located in the center part in the parallel direction of these battery row | line | columns 6A-6E in several battery row | line | column 6A-6E is a pair of electrode part ( At least one of the positive electrode portion 12 and the negative electrode portion 13) is connected only in series with the electrode portion (positive electrode portion 12 or negative electrode portion 13) of the other one battery cell 5 by the conductive member 21. Here, the central portion in the parallel direction of the plurality of battery rows is one battery row located in the center when the number of battery rows is an odd number, and when the number of battery rows is an even number. , Two battery rows located in the center. With this configuration, in the present embodiment, the detection unit 3 includes the positive electrode portion 12 and the negative electrode portion 12 of the battery cell 5 in the battery row 6C positioned at the center portion in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E. At least one voltage of the electrode unit 13 can be detected individually.

  As described above, in the present embodiment, the detection unit 3 includes the battery rows 6A to 6E in the battery rows 6C that are located at the center in the parallel direction (Y direction) of the battery rows 6A to 6E. The voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of the battery cell 5 is individually detected. On the other hand, for the battery cells 5 of the battery rows 6A and 6E located at both ends in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E, the positive electrodes in a state of being connected in parallel with the other battery cells 5 The detection unit 3 detects the voltages of the unit 12 and the negative electrode unit 13. That is, in the present embodiment, the battery cell 5 of the battery row 6C positioned at the center in the parallel direction (Y direction) of the battery rows 6A to 6E that are relatively easy to store heat during operation of the assembled battery device 1. Is a plurality of battery rows 6A to 6A, which individually detect the voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 and relatively easily dissipate heat during operation of the assembled battery device 1 and have relatively small heat storage. For the battery cells 5 of the battery rows 6A and 6E located at both ends in the parallel direction (Y direction) of 6E, the positive electrode portion 12 and the negative electrode portion 13 in a state of being connected in parallel with other battery cells 5 The voltage is detected.

  Here, for example, when the assembled battery device 1 is used in a high-temperature environment, the battery row 6C positioned at the center in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E that are relatively hot. The battery cell 5 may be deteriorated faster than the battery cells 5 of the battery rows 6A and 6E that are located at both ends of the battery rows 6A to 6E in the parallel direction and have a relatively small temperature rise. For this reason, the voltage change of the battery cell 5 of the battery array 6C may become large compared with the battery cell 5 of the battery arrays 6A, 6B, 6D, and 6E. On the other hand, in the present embodiment, the positive electrode portion 12 and the negative electrode portion 13 of the battery cell 5 of the battery row 6C positioned in the central portion in the parallel direction (Y direction) of the plurality of battery rows 6A to 6E. Since at least one voltage is individually detected, the assembled battery device 1 can be used while maintaining the performance of the assembled battery device 1 even in a configuration with relatively few overall voltage measurement points.

<Fourth Embodiment>
FIG. 8 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 8, the present embodiment is different from the first embodiment in the number and arrangement of the battery cells 5 and the configuration of the conductive member group 4.

  In the present embodiment, as an example, the plurality of battery cells 5 are arranged in a matrix. In the present embodiment, as an example, 10 battery rows 6 </ b> A to 6 </ b> J each including four battery cells 5 are arranged in parallel. The first battery row 6A is composed of battery cells 5a1 to 5a4. The second battery row 6B is composed of battery cells 5b1 to 5b4. The third battery row 6C is composed of battery cells 5c1 to 5c4. The fourth battery row 6D is composed of battery cells 5d1 to 5d4. The fifth battery row 6E is composed of battery cells 5e1 to 5e4. The sixth battery row 6F is composed of battery cells 5f1 to 5f4. The seventh battery row 6G is composed of battery cells 5g1 to 5g4. The eighth battery row 6H is composed of battery cells 5h1 to 5h4. The ninth battery row 6I is composed of battery cells 5i1 to 5i4. The tenth battery row 6J is composed of battery cells 5j1 to 5j4.

  The conductive member group 4 includes conductive members 21, 22, 22A, and 22C. The conductive member 22C (series-parallel conductive member) connects ten battery cells 5 in series-parallel (series and parallel). Specifically, the conductive member 22 </ b> C is coupled to the positive electrode portions 12 of the five battery cells 5 and the negative electrode portions 13 of the five battery cells 5 other than the battery cells 5. The part 12 and the negative electrode part 13 are electrically connected. One conductive member 22C is provided as an example.

  In the present embodiment, the conductive members 21, 22, 22A, and 22C are examples of a plurality of first conductive members. In the conductive member group 4, the battery cells 5 are connected in series in the battery rows 6A to 6J by the conductive members 21, 22, 22A. The conductive member group 4 connects the battery rows 6A to 6E and the battery rows 6F to 6J in series and parallel by the conductive member 22C.

  In the present embodiment, as an example, the conductive members 21, 22, 22A, and 22C connect a plurality of battery cells 5 in series to form a plurality of (for example, five) series battery groups 7A to 7E. Yes. Specifically, as an example, the series battery group 7A includes a first battery row 6A (battery cells 5a1 to 5a4) and a tenth row battery row 6J (battery cells 5j1 to 5j4). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b4) and a ninth battery row 6I (battery cells 5i1 to 5i4). The series battery group 7C includes a third battery row 6C (battery cells 5c1 to 5c4) and an eighth battery row 6H (battery cells 5h1 to 5h4). The series battery group 7D includes a fourth battery row 6D (battery cells 5d1 to 5d4) and a seventh battery row 6G (battery cells 5g1 to 5g4). The series battery group 7E includes a fifth battery row 6E (battery cells 5e1 to 5e4) and a sixth battery row 6F (battery cells 5f1 to 5f4). The plurality of series battery groups 7 </ b> A to 7 </ b> E are connected in parallel by a pair of conductive members 23. As can be seen from the above, in the present embodiment, a plurality of battery rows 6A to 6J each having a plurality of battery cells 5 connected in series by the conductive members 21, 22, 22A are arranged in a matrix. Battery cell 5 is arranged.

  Moreover, in this embodiment, each battery cell 5 of battery row | line 6A, 6J located in the both ends in the parallel direction of this battery row | line | column 6A-6J in several battery row | line 6A-6J, and several battery row | line | column In 6A to 6J, the battery cells 5 of the battery rows 6E and 6F positioned at the center in the parallel direction of the plurality of battery rows 6A to 6J are a pair of electrode portions (positive electrode portion 12 and negative electrode portion 13). At least one of them is connected only in series with the electrode part (positive electrode part 12 or negative electrode part 13) of the other battery cell 5 by the conductive member 21. With this configuration, in the present embodiment, the detection unit 3 is a battery of battery rows 6A, 6E, 6F, and 6J positioned at both ends and the center in the parallel direction (Y direction) of the plurality of battery rows 6A to 6J. The voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of the cell 5 can be individually detected.

  Further, in the present embodiment, the battery cells 5 of the battery rows 6B to 6D and 6G to 6I are different from each other in the pair of electrode portions (the positive electrode portion 12 and the negative electrode portion 13) by the conductive member group 4. 5 in parallel with the electrode part (positive electrode part 12 or negative electrode part 13). In the present embodiment, the battery cells 5 of the battery rows 6B to 6D and 6G to 6I include both ends of the plurality of battery cells 5 in the parallel direction of the plurality of battery rows 6A to 6J in the plurality of battery rows 6A to 6J. Battery rows other than the battery cells 5 of the battery rows 6A and 6J located at the center and located at the center of the plurality of battery rows 6A to 6J in the parallel direction of the battery rows 6A to 6J It is an example of battery cells 5 other than the battery cells 5 of 6E and 6F.

  As described above, in the present embodiment, in the battery rows 6A to 6J, the battery rows 6A, 6E, 6F, and 6J positioned at both ends and the center portion in the parallel direction of the battery rows 6A to 6J. Each battery cell 5 has at least one of a pair of electrode parts (positive electrode part 12 and negative electrode part 13), and the electrode part (positive electrode part 12 or negative electrode part) of another battery cell 5 by a conductive member 21. 13) connected only in series. With this configuration, in the present embodiment, the detection unit 3 is a battery of battery rows 6A, 6E, 6F, and 6J positioned at both ends and the center in the parallel direction (Y direction) of the plurality of battery rows 6A to 6J. The voltage of at least one of the positive electrode portion 12 and the negative electrode portion 13 of the cell 5 can be individually detected. Therefore, the assembled battery device 1 can be used in a state in which the performance of the assembled battery device 1 is maintained even in a configuration with relatively few overall voltage measurement points.

<Fifth Embodiment>
FIG. 9 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 9, the present embodiment is different from the second embodiment in that the conductive member group 4 includes a conductive member 22B in addition to the conductive members 21, 22A, and 23. As an example, two conductive members 22B are provided. One conductive member 22B connects battery cells 5a2, 5a3, 5b2, and 5b3 in series and parallel, and the other conductive member 22B connects battery cells 5d2, 5d3, 5e2, and 5e3 in series and parallel.

<Sixth Embodiment>
FIG. 10 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 10, this embodiment differs in the structure of the electrically-conductive member group 4 with respect to 1st Embodiment.

  In the present embodiment, the conductive member group 4 includes a plurality of, for example, three conductive members 22A, a plurality of, for example, three conductive members 22B, and a pair of conductive members 23. In the present embodiment, the conductive members 22A and 22B are an example of a plurality of first conductive members.

  In the present embodiment, the conductive member group 4 includes a plurality of series battery groups 7A to 7E in which a plurality of (eight or more) battery cells 5 are connected in series in a plurality of rows by conductive members 22A and 22B. In addition, the conductive member group 4 has a plurality of series battery groups 7 </ b> A to 7 </ b> E connected in parallel by a pair of conductive members 23.

  In this embodiment, all the conductive members 22A and 22B are batteries in which one of the pair of conductive members 23 is provided in two or more series battery groups 7A to 7E among the plurality of series battery groups 7A to 7E. The same number of battery cells 5 counted from the cell 5 (as an example, the battery cells 5a1, 5b1, 5c1, 5d1, 5e1) are connected in parallel, and 2 from the number twice the number of the series battery groups 7A to 7E. The number of battery cells 5 equal to or less than the subtracted number is connected.

  For example, the conductive member 22A located on the left of the three conductive members 22A in FIG. 10 is a pair of conductive members 23 in the three series battery groups 7A to 7C of the plurality of series battery groups 7A to 7E. The battery cells 5a1, 5b1, and 5c1, which are the same battery cells 5 counted from the battery cells 5a1, 5b1, and 5c1, respectively, are connected in parallel, and the batteries that are the same battery cells 5 Cells 5a2, 5b2, and 5c2 are connected in parallel. Further, the number of the conductive members 22A is not more than the number obtained by subtracting 2 from twice the number of the series battery groups 7A to 7E, that is, 6 in this embodiment, which is 5 × 2-2 = 8 or less. Battery cells 5a1, 5a2, 5b1, 5b2, 5c1, and 5c2 are connected. Further, the conductive member 22B located on the left of the three conductive members 22B in FIG. 10 is a pair of conductive members 23 in the two series battery groups 7D and 7E among the plurality of series battery groups 7A to 7E. The battery cells 5d1 and 5e1 that are the same battery cells 5 counted from the battery cells 5d1 and 5e1 provided with one of the battery cells 5d1 and 5e1 are connected in parallel and the battery cells 5d2 and 5e2 that are the same battery cells 5 Are connected in parallel. In addition, the conductive member 22B has four or fewer than the number obtained by subtracting 2 from twice the number of the series battery groups 7A to 7E, that is, 5 × 2-2 = 8 or less in the present embodiment. Battery cells 5d1, 5d2, 5e1, and 5e2 are connected.

  As described above, in the present embodiment, since the battery cells 5 are connected in series and parallel by the conductive members 22A and 22B, the situation of the battery cells 5 is suppressed while suppressing a decrease in the detection accuracy of the situation of the battery cells 5. The detection efficiency can be improved.

<Seventh Embodiment>
FIG. 11 is a perspective view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. FIG. 12 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. is there. As shown in FIGS. 11 and 12, in the present embodiment, the number of battery cells 5 and the configuration of the conductive member group 4 are different from those in the first embodiment.

  In the present embodiment, six battery cells 5 constitute two rows of battery rows 6A and 6B. The first battery row 6A is composed of battery cells 5a1 to 5a3. The second battery row 6B is composed of battery cells 5b1 to 5b3. The battery cells 5 of the battery rows 6A and 6B are connected in series, and the battery rows 6A and 6B are connected in parallel.

  In the present embodiment, the conductive member group 4 includes two conductive members 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the two battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B form a plurality of (two by way of example) series battery groups 7A and 7B by connecting a plurality of battery cells 5 in series. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 to 5a3). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b3). The plurality of series battery groups 7 </ b> A and 7 </ b> B are connected in parallel by a pair of conductive members 23.

  Moreover, in this embodiment, the contact part 4a of each electroconductive member 21,22B, 23 is comprised by convex shape as an example.

<Eighth Embodiment>
FIG. 13 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 13, in this embodiment, the arrangement of the battery cells 5 and the configuration of the conductive member group 4 are different from those in the seventh embodiment.

  In the present embodiment, six battery cells 5 constitute three rows of battery rows 6A, 6B, 6C. The first battery row 6A is composed of battery cells 5a1 and 5a2. The second battery row 6B is composed of battery cells 5b1 and 5b2. The third battery row 6C is composed of battery cells 5c1 and 5c2. The battery cells 5 of the battery rows 6A to 6C are connected in series, and the battery rows 6A to 6C are connected in parallel.

  In the present embodiment, the conductive member group 4 includes one conductive member 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the three battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B connect a plurality of battery cells 5 in series to form a plurality of (three as an example) series battery groups 7A to 7C. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 and 5a2). The series battery group 7B includes a second battery row 6B (battery cells 5b1 and 5b2). The series battery group 7C is configured by a third battery row 6C (battery cells 5c1 and 5c2). The plurality of series battery groups 7 </ b> A to 7 </ b> C are connected in parallel by a pair of conductive members 23.

<Ninth Embodiment>
FIG. 14 is a plan view showing an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 14, in the present embodiment, the arrangement of the battery cells 5 and the configuration of the conductive member group 4 are different from those in the seventh embodiment.

  In the present embodiment, the eight battery cells 5 constitute two rows of battery rows 6A and 6B. The first battery row 6A is composed of battery cells 5a1 to 5a4. The second battery row 6B is composed of battery cells 5b1 to 5b4. The battery cells 5 of the battery rows 6A and 6B are connected in series, and the battery rows 6A and 6B are connected in parallel.

  In the present embodiment, the conductive member group 4 includes four conductive members 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the two battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B form a plurality of (two by way of example) series battery groups 7A and 7B by connecting a plurality of battery cells 5 in series. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 to 5a4). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b4). The plurality of series battery groups 7 </ b> A and 7 </ b> B are connected in parallel by a pair of conductive members 23.

  Next, first and second modifications of the present embodiment will be described. As shown in FIG. 15, in the first modified example, the arrangement of the conductive members 21 and 22B is different from the arrangement of FIG. Further, as shown in FIG. 16, in the second modification, the conductive member group 4 includes two conductive members 21, two conductive members 22 </ b> B, and a pair of conductive members 23. is there.

<Tenth Embodiment>
FIG. 17 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 17, in the present embodiment, the arrangement of the battery cells 5 and the configuration of the conductive member group 4 are different from those in the seventh embodiment.

  In the present embodiment, the eight battery cells 5 constitute four battery rows 6A to 6D. The first battery row 6A is composed of battery cells 5a1 and 5a2. The second battery row 6B is composed of battery cells 5b1 and 5b2. The third battery row 6C is composed of battery cells 5c1 and 5c2. The fourth battery row 6D is composed of battery cells 5d1 and 5d2. The battery cells 5 of the battery rows 6A to 6D are connected in series, and the battery rows 6A to 6D are connected in parallel.

  In the present embodiment, the conductive member group 4 includes two conductive members 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the four battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B connect a plurality of battery cells 5 in series in a plurality of rows to form a plurality (four as an example) of series battery groups 7A to 7D. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 and 5a2). The series battery group 7B includes a second battery row 6B (battery cells 5b1 and 5b2). The series battery group 7C is configured by a third battery row 6C (battery cells 5c1 and 5c2). The series battery group 7D is configured by a fourth battery row 6D (battery cells 5d1, 5d2). The plurality of series battery groups 7 </ b> A to 7 </ b> D are connected in parallel by a pair of conductive members 23.

  Next, the 1st-3rd modification of this embodiment is demonstrated. As shown in FIG. 18, in the first modification, the arrangement of the conductive members 21 and 22B is different from the arrangement of FIG. As shown in FIG. 19, in the second modified example, the conductive member group 4 includes two conductive members 22 </ b> B and a pair of conductive members 23. As shown in FIG. 20, in the third modified example, the conductive member group 4 has a configuration including one conductive member 21, one conductive member 22 </ b> A, and a pair of conductive members 23. is there.

<Eleventh embodiment>
FIG. 21 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 21, in the present embodiment, the arrangement of the battery cells 5 and the configuration of the conductive member group 4 are different from those in the seventh embodiment.

  In the present embodiment, nine battery cells 5 constitute three rows of battery rows 6A to 6C. The first battery row 6A is composed of battery cells 5a1 to 5a3. The second battery row 6B is composed of battery cells 5b1 to 5b3. The third battery row 6C is composed of battery cells 5c1 to 5c3. The battery cells 5 of the battery rows 6A to 6C are connected in series, and the battery rows 6A to 6C are connected in parallel.

  In the present embodiment, the conductive member group 4 includes four conductive members 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the three battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B connect a plurality of battery cells 5 in series to form a plurality of (three as an example) series battery groups 7A to 7C. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 to 5a3). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b3). The series battery group 7C is configured by a third battery row 6C (battery cells 5c1 to 5c3). The plurality of series battery groups 7 </ b> A to 7 </ b> C are connected in parallel by a pair of conductive members 23.

  Next, the 1st-3rd modification of this embodiment is demonstrated. As shown in FIG. 22, in the first modified example, the conductive member group 4 has a configuration including two conductive members 21, two conductive members 22 </ b> B, and a pair of conductive members 23. As shown in FIG. 23, in the second modification, the conductive member group 4 has a configuration including three conductive members 21, one conductive member 22 </ b> A, and a pair of conductive members 23. is there. As shown in FIG. 24, in the third modification, the conductive member group 4 includes one conductive member 21, one conductive member 22A, one conductive member 22B, and a pair of conductive members. 23.

<Twelfth Embodiment>
FIG. 25 is a plan view illustrating an example of the power storage unit 2 in the assembled battery device 1 according to the present embodiment. As shown in FIG. 25, in this embodiment, the arrangement of the battery cells 5 and the configuration of the conductive member group 4 are different from those in the seventh embodiment.

  In the present embodiment, twelve battery cells 5 constitute four battery rows 6A to 6D. The first battery row 6A is composed of battery cells 5a1 to 5a3. The second battery row 6B is composed of battery cells 5b1 to 5b3. The third battery row 6C is composed of battery cells 5c1 to 5c3. The fourth battery row 6D is composed of battery cells 5d1 to 5d3. The battery cells 5 of the battery rows 6A to 6D are connected in series, and the battery rows 6A to 6D are connected in parallel.

  In the present embodiment, the conductive member group 4 includes six conductive members 21, one conductive member 22 </ b> B, and a pair of conductive members 23. In the present embodiment, the conductive members 21 and 22B are an example of a first conductive member. In the present embodiment, the conductive member 23 connects the four battery cells 5 only in parallel.

  In the present embodiment, as an example, the conductive members 21 and 22B connect a plurality of battery cells 5 in series in a plurality of rows to form a plurality (four as an example) of series battery groups 7A to 7D. Specifically, the series battery group 7A is configured by the first battery row 6A (battery cells 5a1 to 5a3). The series battery group 7B includes a second battery row 6B (battery cells 5b1 to 5b3). The series battery group 7C is configured by a third battery row 6C (battery cells 5c1 to 5c3). The series battery group 7D is configured by a fourth battery row 6D (battery cells 5d1 to 5d3). The plurality of series battery groups 7 </ b> A to 7 </ b> D are connected in parallel by a pair of conductive members 23.

  Next, a modification of this embodiment will be described.

  As shown in FIG. 26, in the first modification example, the conductive member group 4 includes four conductive members 21, two conductive members 22B, and a pair of conductive members 23. Yes.

  As shown in FIG. 27, in the second modification example, the conductive member group 4 includes two conductive members 21, three conductive members 22B, and a pair of conductive members 23. Yes.

  As shown in FIG. 28, in the third modification example, the conductive member group 4 includes four conductive members 21, two conductive members 22B, and a pair of conductive members 23. Yes.

  As shown in FIG. 29, in the fourth modification example, the conductive member group 4 includes four conductive members 22 </ b> B and a pair of conductive members 23.

  As shown in FIG. 30, in the fifth modification, the conductive member group 4 includes five conductive members 21, one conductive member 22 </ b> A, and a pair of conductive members 23. Yes.

  As shown in FIG. 31, in the sixth modification, the conductive member group 4 includes three conductive members 21, one conductive member 22A, one conductive member 22B, and a pair of conductive members 23. , And is configured.

  As shown in FIG. 32, in the seventh modification, the conductive member group 4 includes three conductive members 21, one conductive member 22A, one conductive member 22B, and a pair of conductive members 23. , And is configured.

  As shown in FIG. 33, in the eighth modification example, the conductive member group 4 includes one conductive member 21, one conductive member 22A, two conductive members 22B, and a pair of conductive members 23. , And is configured.

  As shown in FIG. 34, in the ninth modified example, the conductive member group 4 includes two conductive members 21, two conductive members 22A, and a pair of conductive members 23. Yes.

  As shown in FIG. 35, in the tenth modification example, the conductive member group 4 includes two conductive members 21, two conductive members 22A, and a pair of conductive members 23. Yes.

  As shown in FIG. 36, in the eleventh modified example, the conductive member group 4 includes four conductive members 21, one conductive member 22D, and a pair of conductive members 23. Yes. The conductive member 22D connects the eight battery cells 5 in series and parallel.

  As shown in FIG. 37, in the twelfth modified example, the conductive member group 4 includes two conductive members 21, one conductive member 22B, one conductive member 22D, and a pair of conductive members 23. , And is configured.

  As shown in FIG. 38, in the thirteenth modification example, the conductive member group 4 includes two conductive members 22B, one conductive member 22D, and a pair of conductive members 23. Yes.

  As shown in FIG. 39, in the fourteenth modified example, the conductive member group 4 includes one conductive member 21, one conductive member 22A, one conductive member 22D, and a pair of conductive members 23. , And is configured.

  As described above, according to each of the embodiments and the modifications described above, as an example, the efficiency of detecting the voltage (situation) of the battery cell 5 is improved while suppressing a decrease in the detection accuracy of the voltage (situation) of the battery cell 5. be able to.

  As mentioned above, although embodiment and the modification of this invention were illustrated, the said embodiment and modification are an example to the last, Comprising: It is not intending limiting the range of invention. These embodiments and modifications can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the spirit of the invention. These embodiments, modifications, and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. In addition, the specifications of each component (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) should be changed as appropriate. Can do.

  For example, the battery is not limited to the battery cell 5 and may be a battery pack in which a plurality of battery cells 5 are connected. In this case, the power storage unit 2 has a plurality of assembled batteries.

  DESCRIPTION OF SYMBOLS 1 ... Assembly battery apparatus, 2 ... Power storage part, 3 ... Detection part, 4 ... Conductive member group, 4a ... Contact part, 5 ... Battery cell, 6A-6J ... Battery row, 7A-7J ... Series battery group, 9 ... Management Device: 12 ... Positive electrode part (electrode part), 13 ... Negative electrode part (electrode part), 21, 22, 22A, 22B, 22C, 22D ... Conductive member (first conductive member), 23 ... Conductive member (first) Second conductive member).

Claims (9)

6 or more batteries,
A plurality of first conductive members that connect the six or more batteries in a plurality of rows in series to form a plurality of series battery groups; and a pair of second conductive members that connect the plurality of series battery groups in parallel; A part of the plurality of first conductive members is provided with one of the pair of second conductive members in the two or more series battery groups of the plurality of series battery groups. A group of conductive members, each of which is connected in parallel with the same number of batteries counted from the batteries
An assembled battery device. The battery has a pair of electrode portions,
2. The assembled battery device according to claim 1, wherein at least one of the pair of electrode portions of each of the batteries is connected only in series with the electrode portions of the other batteries by the first conductive member. The battery has a pair of electrode portions,
2. The assembled battery device according to claim 1, wherein a part of the six or more batteries has the pair of electrode portions connected in parallel to the electrode portions of the other batteries by the conductive member group. The six or more batteries are arranged in a matrix in which a plurality of battery rows having a plurality of batteries connected in series by the first conductive member are arranged in parallel,
In each of the plurality of battery rows, each battery of the battery row positioned at both ends in the parallel direction of the plurality of battery rows has at least one of the pair of electrode portions separated by the first conductive member. Connected in series with the electrode part of one of the batteries,
Each said battery of the said battery row | line | column located other than the said both ends is connected to the said electrode part of the other said battery in parallel with the said electroconductive member group, respectively. The assembled battery device described. The six or more batteries are arranged in a matrix in which a plurality of battery rows having a plurality of batteries connected in series by the first conductive member are arranged in parallel,
In each of the plurality of battery rows, each battery of the battery row positioned at both ends in the parallel direction of the plurality of battery rows is configured such that each of the pair of electrode portions is different from the other battery by the conductive member group. Connected in parallel with the electrode part,
In each of the plurality of battery rows, each battery of the battery row positioned at a central portion in the parallel direction of the plurality of battery rows has at least one of the pair of electrode portions separated by the first conductive member. The assembled battery device according to claim 3, which is connected only in series with the electrode part of one of the batteries. The six or more batteries are arranged in a matrix in which a plurality of battery rows having a plurality of batteries connected in series by the first conductive member are arranged in parallel,
In each of the plurality of battery rows, each battery of the battery row located at both ends in the parallel direction of the plurality of battery rows, and in the central portion of the plurality of battery rows in the parallel direction of the plurality of battery rows Each of the batteries in the battery row positioned is at least one of the pair of electrode parts connected in series with the electrode part of the other one battery by the first conductive member,
Among the six or more batteries, in the plurality of battery rows, other than each of the batteries in the battery row located at both ends in the parallel direction of the plurality of battery rows, and in the plurality of battery rows The batteries other than the batteries in the battery array positioned in the central part in the parallel direction of the plurality of battery arrays are each configured such that each of the pair of electrode parts is the electrode part of the other battery by the conductive member group. The assembled battery device according to claim 3, connected in parallel with each other. More than 8 batteries,
A plurality of first conductive members connected to a plurality of rows of the eight or more batteries in series to form a plurality of series battery groups; and a pair of second conductive members connected in parallel to the plurality of series battery groups; All of the plurality of first conductive members are provided with one of the pair of second conductive members in two or more of the series battery groups of the plurality of series battery groups. A conductive member group in which the same number of the batteries counted from the battery are connected in parallel and the number of the batteries equal to or less than the number obtained by subtracting 2 from twice the number of the series battery groups;
An assembled battery device.   The assembled battery device according to any one of claims 1 to 7, further comprising a detection unit that is connected to each of the first conductive members and each of the second conductive members and detects a state of the battery.   The assembled battery device according to claim 8, further comprising a management device to which information indicating the state of the battery detected by the detection unit is input from the detection unit.

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