Cell system

Abstract

To provide a cell system that can improve abnormality detection performance of a battery with a temperature fuse by stably exposing the temperature fuse to a gas emitted from a battery, thereby facilitating a route design and a wiring work of a wire harness.SOLUTION: A cell system 10 includes a battery 12 having an open portion 14 therein, an exhaust path 16 through which a gas discharged from the open portion 14 is guided, a temperature fuse 18 provided at a gas-passing position in the exhaust path 16, an abnormality determination unit 20 for determining the presence or absence of an abnormality in the battery 12 based on a signal from the temperature fuse 18, and an attached body 26 which is installed for the battery 12 and to which a wire harness 24 having the temperature fuse 18 and a connector 22 is attached. The exhaust path 16 passes through the attached body 26, the temperature fuse 18 is attached to the attached body 26 in the exhaust path 16 passing through the attached body 26, and the connector 22 is attached to the attached body 26 at a position where the exhaust path 16 does not pass.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a battery system. [Background technology]

[0002] Patent Document 1 discloses a battery module including a plurality of batteries each having an opening for discharging internal gas when the internal pressure rises, and an exhaust path for directing the gas discharged from the plurality of openings to an opening. In this battery system, a temperature fuse, which is a non-returnable switching element that changes when the temperature reaches or exceeds a reference temperature, is disposed at a position where the gas discharged from the opening passes. A high temperature abnormality determination unit including the temperature fuse is capable of quickly detecting an abnormality in the battery accompanied by gas generation due to an internal short circuit or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2012 / 014449 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the battery system of Patent Document 1, the thermal fuse needs to be exposed to the gas discharged from the opening of the exhaust passage, but since the gas discharged from the opening spreads in all directions from the opening, the thermal fuse cannot be stably exposed to the exhaust gas, and there is a risk that the performance of the thermal fuse in detecting abnormalities in the battery may be reduced. Also, for example, when the thermal fuse is fixed to a wire harness arranged in the battery system, the thermal fuse needs to be positioned near the opening when the wire harness is arranged, which creates problems such as limitations on the route design of the wire harness and cumbersome wiring work.

[0005] Therefore, we disclose a battery system that can improve the battery abnormality detection performance of the temperature fuse by stably exposing the temperature fuse to gas emitted from the battery, thereby making it easier to design the wiring harness route and perform the installation work. [Means for solving the problem]

[0006] The battery system disclosed herein comprises a battery having an open portion through which internal gas is discharged when internal pressure rises, an exhaust path through which the gas discharged from the open portion is guided, a temperature fuse provided at a position in the exhaust path through which the gas passes, an abnormality determination unit that determines the presence or absence of an abnormality in the battery based on a signal from the temperature fuse, and a mounting body to which is attached a wire harness having the temperature fuse and a connector and installed relative to the battery, wherein a portion of the exhaust path passes through the mounting body, the temperature fuse is attached to the mounting body at the exhaust path that passes through the mounting body, and the connector is attached to the mounting body at a position through which the exhaust path does not pass. Effect of the Invention

[0007] According to the battery system disclosed herein, the temperature fuse can be stably exposed to gas emitted from the battery, thereby improving the battery abnormality detection performance of the temperature fuse, and facilitating the route design and wiring work of the wire harness. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a battery system according to the first embodiment. [Diagram 2] FIG. 2 is a longitudinal sectional view showing a model of the II-II cross section in FIG. [Diagram 3] FIG. 3 is a longitudinal sectional view showing a model of the cross section taken along line III-III in FIG. [Figure 4] FIG. 4 is an exploded perspective view of the battery system shown in FIG. [Diagram 5]FIG. 5 is a perspective view showing a mounting body constituting the battery system shown in FIG. 1, viewed from the bottom side. [Figure 6] FIG. 6 is a perspective view showing a battery system according to the second embodiment. [Figure 7] FIG. 7 is a longitudinal sectional view showing a model of a cross section taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a vertical cross-sectional view showing a battery system according to the third embodiment, and corresponds to FIG. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a battery system according to the fourth embodiment, and corresponds to FIG. [Figure 10] FIG. 10 is a vertical sectional view showing a model of the cross section XX in FIG. [Figure 11] FIG. 11 is a perspective view showing a battery system according to another embodiment of the present disclosure. [Figure 12] FIG. 12 is a longitudinal sectional view showing a model of the XII-XII section in FIG. [Figure 13] FIG. 13 is a longitudinal sectional view showing a model of the XIII-XIII cross section in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <Description of the embodiments of the present disclosure> First, embodiments of the present disclosure will be listed and described. The battery system of the present disclosure comprises: (1) A battery comprising: a battery having an open portion through which internal gas is discharged when internal pressure rises; an exhaust path through which the gas discharged from the open portion is guided; a temperature fuse provided at a position in the exhaust path through which the gas passes; an abnormality determination unit that determines the presence or absence of an abnormality in the battery based on a signal from the temperature fuse; and a mounting body to which is attached a wire harness having the temperature fuse and a connector and installed relative to the battery, wherein a portion of the exhaust path passes through the mounting body, the temperature fuse is attached to the mounting body at the exhaust path that passes through the mounting body, and the connector is attached to the mounting body at a position through which the exhaust path does not pass.

[0010] According to this aspect, the thermal fuse is provided at a position in the exhaust path through which the gas discharged from the open part of the battery passes. This allows the thermal fuse to be stably exposed to the gas discharged from the battery, compared to a conventional structure in which the thermal fuse is provided outside the exhaust path. As a result, the thermal fuse can detect the gas temperature more accurately, and the performance of the thermal fuse in detecting abnormalities in the battery can be improved.

[0011] In addition, a part of the exhaust path through which the exhaust gas from the battery is guided is provided through a part of the mounting body to which the wire harness having the temperature fuse and the connector is attached, which is installed relative to the battery. The temperature fuse of the wire harness is attached to the mounting body in the exhaust path that passes through the mounting body, and the connector of the wire harness is attached to the mounting body at a position where the exhaust path does not pass. This makes it possible to easily position the temperature fuse extending from the same wire harness in the exhaust path formed in the mounting body by simply attaching the connector of the wire harness to the mounting body, and advantageously suppress the temperature fuse from coming off from the mounting body. As a result, compared to the case where the temperature fuse is fixed to the wire harness that is arranged in the battery system, it is not necessary to align the temperature fuse with the exhaust path when the wire harness is arranged, and the route design and arrangement work of the wire harness can be made easier. In addition, since the connector is attached to a position where the exhaust path of the mounting body does not pass, the thermal effect of the gas discharged from the battery on the connector can be suppressed.

[0012] Here, the thermal fuse of the wire harness may be provided at the end of a lead wire drawn from the wire bundle of the wire harness. It is desirable for the lead wire to have a certain amount of slack, which can advantageously absorb the tolerance between the connection part of the connector in the mounting body and the exhaust passage in which the thermal fuse is housed.

[0013] The exhaust path may have any structure as long as it constitutes a path for guiding the gas discharged from the open part toward the thermal fuse. For example, the exhaust path may be formed by connecting through holes or holes provided in a member including the mounting body interposed between the open part of the battery and the thermal fuse, or may be formed by providing a chimney-shaped tube protruding toward the battery side on the mounting body, with one end of the tube communicating with the open part of the battery and the other end of the tube communicating with the exhaust path provided on the mounting body. Alternatively, the exhaust path may be formed by providing a chimney-shaped tube on the housing that houses the battery, with one end of the tube communicating with the open part of the battery and the other end of the tube communicating with the exhaust path provided on the mounting body.

[0014] (2) In the above (1), it is preferable that the mounting body is installed in a vertically upward position relative to the battery, and the connector is attached to the mounting body at a vertically upward position relative to the thermal fuse. By installing the mounting body at a vertically upward position relative to the battery, gas is quickly guided from the open part of the battery to the exhaust path forming part of the mounting body where the thermal fuse is provided, and the high-temperature gas detection performance of the thermal fuse can be improved. In addition, by setting the mounting position of the connector to the mounting body at a vertically upward position relative to the thermal fuse at the exhaust path forming part, the thermal effect of the gas discharged from the battery on the connector can be suppressed.

[0015] (3) In the above (1) or (2), it is preferable that the thermal fuse is fixed to the connector. The thermal fuse attached to the exhaust passage passing through the attachment body has a predetermined distance and angle with respect to the connector attached to the attachment body, and the distance and angle with respect to the connector are fixed. This improves the ease of assembling the thermal fuse to the attachment body.

[0016] (4) In the above (3), it is preferable that the portion of the mounting body to which the connector is attached is a hood provided on the outside of the connector, the axis of the exhaust passage at the portion to which the thermal fuse is attached is parallel to a surface constituting the inner circumference of the hood, and the overlap length of the connector and the hood in the direction of the axis is longer than the overlap length of the thermal fuse and the exhaust passage in the direction of the axis. With this configuration, the thermal fuse can be placed in a state where it is not in the exhaust passage when the connector starts to be fitted, and when the thermal fuse is assembled to the mounting body, the fitting of the connector of the wire harness to the hood can be used to position the thermal fuse in the exhaust passage. This improves the ease of assembly of the thermal fuse to the mounting body.

[0017] Note that the faces that make up the inner circumference of the hood are set with only the minimum angle for punching, and the draft angle is almost zero. In this case, the direction of the "lines parallel to the faces that make up the inner circumference of the hood" can be specified as one. Also, the inner circumference of the hood does not need to be the entire circumference, and can be composed of multiple partial faces as long as the connector mating position and angle and protection of the terminals are guaranteed. In this case, too, since only the minimum draft angle should be set for those faces, the direction of the "lines parallel to the faces that make up the inner circumference of the hood" can be specified as one.

[0018] (5) In any one of the above (1) to (4), it is preferable that the abnormality determination unit is provided on the mounting body. Since the abnormality determination unit is also provided on the mounting body to which the thermal fuse is attached, it is possible to shorten the path for transmitting a signal from the thermal fuse to the abnormality determination unit, thereby making it possible to reduce the weight of the battery system.

[0019] (6) In any one of the above (1) to (5), it is preferable that the thermal fuse is engageable with the object to be attached. The thermal fuse may be engaged with the object to be attached not only via the connector but also via other mechanisms. This allows the thermal fuse to be held more stably at a predetermined position on the object to be attached. Any means such as a lock arm, press-fitting, or screw may be used to make the thermal fuse engageable with the object to be attached. For example, the thermal fuse may be engaged with the object to be attached by engaging the thermal fuse with a fuse mounting hole provided in the object to be attached by pressure welding, lock fitting, or screwing, or the like, or the thermal fuse may be assembled with a fuse mounting hole provided in a housing of a connector to be fitted with the object to be attached by pressure welding, lock fitting, or screwing, and engaged with the object to be attached via the housing of the connector.

[0020] <Details of the embodiment of the present disclosure> Specific examples of the battery system of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0021] <Embodiment 1> Hereinafter, the battery system 10 according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 5. The battery system 10 is mounted on, for example, an electric vehicle or a hybrid vehicle, and detects an abnormality when an abnormality occurs in the battery 12 installed in the vehicle. The battery system 10 is assembled to the vehicle in such a direction that the upper side in FIG. 2 faces upward in the vertical direction, and the lower side in FIG. 2 faces downward in the vertical direction. The left-right direction and the front-rear direction of the battery system 10 when assembled to the vehicle are not limited, but in the following, the left side refers to the left side in FIG. 2, the right side refers to the right side in FIG. 2, the front side refers to the left side in FIG. 3, and the rear side refers to the right side in FIG. 3. In addition, for multiple identical members, only some of the members may be labeled, and the other members may be omitted. Each drawing shows the battery systems 10, 70, 90, 100, and 120 in a model manner, and the thickness dimensions of each member may be exaggerated for ease of understanding.

[0022] <Battery System 10> The battery system 10 comprises a plurality of batteries 12 each having an opening 14 through which internal gas is discharged when internal pressure rises, an exhaust path 16 through which the gas discharged from each opening 14 is guided, and a temperature fuse 18 provided at a position in the exhaust path 16 through which the gas passes. The battery system 10 also comprises an abnormality determination unit 20 that determines the presence or absence of an abnormality in the batteries 12 based on a signal from the temperature fuse 18, and an ECU 26 as a mounting body to which a wire harness 24 having the temperature fuse 18 and a connector 22 is attached, the wire harness 24 being provided for the batteries 12.

[0023] <Battery 12> The battery 12 has a known structure, also called a single cell or a unit cell, and has an opening 14 for releasing gas to the outside of the battery when the pressure inside the battery rises due to an internal short circuit or the like. The battery 12 is generally rectangular box-shaped and is filled with an electrolyte or the like. In the first embodiment, for example, a lithium ion secondary battery or the like can be used, but various secondary batteries or primary batteries can be used. Since the battery 12 can have a known structure, a detailed description of the internal structure is omitted. The battery 12 is provided with a positive electrode and a negative electrode (not shown) that protrude upward. A plurality of the batteries 12 are arranged, for example, in the front-rear direction to form a battery group 28.

[0024] A busbar module 30 is provided above the battery group 28, and the positive and negative electrodes protruding upward from each battery 12 are connected by the busbar module 30. The batteries 12 may be electrically connected in series or in parallel by the busbar module 30. Since a known structure is also adopted for the busbar module 30, detailed description is omitted, but for example, one or more busbars are arranged on a base member made of synthetic resin, and the multiple busbar modules 30 are arranged side by side in the front-rear direction. The positive and negative electrodes of each battery 12 are connected by the busbars on the busbar modules 30.

[0025] The busbar module 30 has a first through hole 32 that penetrates in the up-down direction. This first through hole 32 is formed in a position corresponding to the open portion 14 of the battery 12 when the battery 12 and the busbar module 30 are assembled. In the first embodiment, as described above, the multiple batteries 12 are arranged side by side in the front-rear direction, and as shown in Fig. 3, the first through hole 32 is formed in the busbar module 30 at a position corresponding to the open portion 14 of the battery 12 that is located most forward.

[0026] The battery group 28 (the plurality of batteries 12) connected by the busbar module 30 in this manner is housed in a housing 34. The housing 34 has a hollow shape as a whole, and is composed of, for example, a housing body 36 that opens upward, and a lid 38 that covers the upper opening of the housing body 36. The material of the housing 34 is not limited, and it can be made of, for example, metal or synthetic resin, but in the first embodiment, it is made of metal. The housing 34 has a predetermined length dimension in the front-rear direction so that the battery group 28 can be housed therein. After the battery group 28 is housed in the housing body 36, the housing body 36 and the lid 38 are overlapped with each other and fixed by bolts or the like. A second through hole 40 that penetrates in the up-down direction is formed in the lid 38 of the housing 34.

[0027] <Open section 14> The battery 12 is provided with an opening 14, and in the first embodiment, the opening 14 is open on the upper end surface of the battery 12. As described above, the busbar module 30 is formed with a first through hole 32 at a position corresponding to the opening 14 of the battery 12. In addition, the cover 38 is formed with a second through hole 40, and when the battery group 28 and the busbar module 30 are housed in the housing 34, the opening 14, the first through hole 32, and the second through hole 40 communicate with each other in the up-down direction. The shapes of the first and second through holes 32, 40 are not limited, but are each, for example, a circular through hole, and in the first embodiment, the first and second through holes 32, 40 are formed to be approximately the same size.

[0028] <Attachment object (ECU26)> In the first embodiment, the ECU 26 is installed above the housing 34 as an attachment object. The ECU 26 is for controlling, for example, the battery 12 (or the battery group 28), and a circuit body including a printed circuit board 44 and the like is housed inside a hollow case 42. In the first embodiment, the case 42 is configured to include an upper case 46 and a lower case 48, and the case 42 is made of, for example, synthetic resin. That is, the printed circuit board 44 is housed in the lower case 48 that opens upward, and the upper opening of the lower case 48 is covered by the upper case 46, thereby forming the ECU 26. The printed circuit board 44 has an electric circuit (not shown) printed on one or both surfaces in the plate thickness direction (vertical direction in the first embodiment) of a base plate part made of, for example, synthetic resin. The electric circuit in the printed circuit board 44 may be electrically connected to the busbar module 30 by, for example, an electric wire (not shown). In addition, a microcomputer (not shown) constituting the abnormality determination unit 20 described later, a temperature sensor, and the like may be mounted on the printed circuit board 44. The ECU 26 can be fixed to the upper surface of the housing 34 by a known method such as adhesion or welding.

[0029] A thermal fuse 18 and a connector 22 are attached to the terminal of an electric wire 49 extending from the electric wire bundle of the wire harness 24 in the ECU 26. The attachment positions of the thermal fuse 18 and the connector 22 in the ECU 26 are not limited, but in the first embodiment, as shown in Figures 2 and 3, the thermal fuse 18 is attached to a lower portion of the ECU 26 (e.g., the lower case 48), and the connector 22 is attached to a vertical intermediate portion of the ECU 26 (e.g., straddling the upper case 46 and the lower case 48).

[0030] That is, in the first embodiment, the mounting body (ECU 26) is disposed at a position facing vertically upward with respect to the battery 12, and the connector 22 is mounted on the mounting body (ECU 26) at a position facing vertically upward from the thermal fuse 18. In particular, in the first embodiment, the connector 22 and the thermal fuse 18 are mounted on the mounting body (ECU 26) at positions spaced apart from each other in the left-right direction. The connector 22 is electrically connected to an electric circuit provided on the upper surface of the printed circuit board 44, for example, via a terminal protruding downward. By electrically connecting the connector 22 and the printed circuit board 44, it is possible to, for example, supply power to the printed circuit board 44, or transmit a signal from a microcomputer or the like mounted on the printed circuit board 44 to the outside.

[0031] In the first embodiment, a hood mounting hole 50 is provided between the upper case 46 and the lower case 48, and a fuse mounting hole 52 is provided in the lower case 48, and a temperature fuse 18 is mounted in the lower case 48. The hood mounting hole 50 and the fuse mounting hole 52 are formed in the case 42 at positions spaced apart from each other in the left-right direction. The hood 58 is, for example, a hollow, substantially rectangular box-like shape, and the hood mounting hole 50 has, for example, a substantially rectangular cross section and opens forward. The temperature fuse 18 is, for example, a substantially cylindrical shape, and the fuse mounting hole 52 has, for example, a substantially circular cross section and opens forward. The hood mounting hole 50 and the fuse mounting hole 52 are formed to extend rearward from the front end of the ECU 26 with a predetermined length dimension. The inner diameter dimension of the fuse mounting hole 52 is made larger than the outer diameter dimension of the temperature fuse 18, so that when the temperature fuse 18 is mounted in the fuse mounting hole 52, a roughly annular gap 53 is formed between the inner surface of the fuse mounting hole 52 and the outer surface of the temperature fuse 18.

[0032] 3 and 5, a third through hole 54 is formed in the bottom of the lower case 48 at a position corresponding to the first and second through holes 32, 40 in the housing 34, penetrating in the up-down direction, and the upper end of this third through hole 54 opens to the inner peripheral surface of the fuse mounting hole 52. The inner diameter of the third through hole 54 is larger than the outer diameter (width in the left-right direction) of the thermal fuse 18, and in the first embodiment, is approximately the same as the first and second through holes 32, 40. As a result, even when the thermal fuse 18 is mounted in the fuse mounting hole 52, the third through hole 54 is not blocked by the thermal fuse 18, and the internal space of the fuse mounting hole 52 communicates with the external space through the third through hole 54 and the gap 53.

[0033] In particular, in the first embodiment, a slit 56 is formed in the bottom of the fuse mounting hole 52, extending in the front-rear direction, and the slit 56 opens to the front of the fuse mounting hole 52 and penetrates the bottom of the fuse mounting hole 52 in the up-down direction. This slit 56 is provided over the entire length of the fuse mounting hole 52. The third through hole 54 is provided in the middle part of the slit 56 in the length direction. By providing such a slit 56, when inserting the thermal fuse 18 into the fuse mounting hole 52, the air inside the fuse mounting hole 52 can be easily released through the slit 56, thereby reducing the insertion resistance. Alternatively, when an abnormality occurs in the battery 12, which will be described later, the gas generated from the battery 12 can easily affect the entire thermal fuse 18, making it easier to melt the thermal fuse 18.

[0034] In the first embodiment, the connector 22 is attached across the upper case 46 and the lower case 48 of the ECU 26 via a hood 58. The hood 58 is formed to a size that allows it to be inserted into the hood mounting hole 50, and is, for example, in the shape of a substantially rectangular box that opens forward. After being inserted into the hood mounting hole 50, the hood 58 can be fixed, for example, by adhesion or the like. The internal space of the hood 58 is a connector mounting hole 60 into which the connector 22 is attached, and the connector mounting hole 60 opens forward. In particular, in the first embodiment, a substantially rectangular locking hole 62 that penetrates in the up-down direction is formed in an upper wall portion that constitutes the hood 58.

[0035] The hood 58 has a greater front-rear dimension than the hood mounting hole 50, and when the hood 58 is inserted into and fixed in the hood mounting hole 50, a front portion of the hood 58 protrudes forward from the hood mounting hole 50 (upper case 46). The locking hole 62 is provided in the front portion of the hood 58, and when the hood 58 is inserted into and fixed in the hood mounting hole 50, the locking hole 62 is exposed to the outside at a position forward of the upper case 46 (case 42). The hood 58 may be formed integrally with the upper case 46 or the lower case 48.

[0036] <Exhaust Channel 16> By fixing the ECU 26 having the above-mentioned structure on the upper surface of the housing 34, the first to third through holes 32, 40, 54 and the fuse mounting hole 52 communicate with each other. Even when the thermal fuse 18 is mounted in the fuse mounting hole 52, the first to third through holes 32, 40, 54 and the gap 53 communicate with each other, and high-temperature gas ejected from the open portion 14 of the battery 12 is discharged to the outside through these spaces. Therefore, in the first embodiment, the exhaust path 16 to which the gas discharged from the open portion 14 is guided is constituted by the first to third through holes 32, 40, 54 and the gap 53. That is, a part of the exhaust path 16 (the third through hole 54 and the gap 53) passes through the ECU 26, which is the mounting object. The thermal fuse 18 is mounted in the fuse mounting hole 52 of the lower case 48 constituting the ECU 26 in the exhaust path 16 passing through the ECU 26. In addition, the hood mounting hole 50 (connector mounting hole 60) is formed at a different position in the vertical and horizontal directions from the fuse mounting hole 52, and the connector 22 is attached to the mounting body (ECU 26) at a position where the exhaust path 16 does not pass.

[0037] In this manner, in the first embodiment, the exhaust path 16 extends in the vertical direction in the region where the first to third through holes 32, 40, 54 are formed, and extends in the horizontal direction in the region where the gap 53 (fuse mounting hole 52) is formed. As a result, as shown in Fig. 3, the axis L of the exhaust path 16 also extends in the vertical direction in the lower portion, and is bent to the left at the upper end portion.

[0038] <Thermal fuse 18> A known thermal fuse may be adopted as the thermal fuse 18, which melts when the temperature acting on the thermal fuse 18 exceeds a certain value. The temperature at which the thermal fuse 18 melts may be set arbitrarily, but may be set, for example, so that the thermal fuse 18 melts when gas at 100° C. is sprayed onto the thermal fuse 18. An end of the thermal fuse 18 is connected to an electric wire 49, and the thermal fuse 18 electrically connects, for example, an electric circuit of the printed circuit board 44 and an external device (not shown) connected to the wire harness 24 via the electric wire 49.

[0039] The thermal fuse 18 thus constructed is inserted into a fuse mounting hole 52 provided in the lower case 48 and disposed so as to extend in the front-rear direction. The thermal fuse 18 is engageable with a body to which it is attached (e.g., the lower case 48 constituting the ECU 26). The manner of engagement between the thermal fuse 18 and the body to which it is attached (e.g., the lower case 48) is not limited, but any known engagement method may be used, such as recess-projection fitting of a lock arm or the like, press fitting, screws, etc.

[0040] <Connector 22> A known connector may be used as the connector 22. The lead wire 49 is connected to one end of the connector 22. The connector 22 is inserted from the other end into a connector mounting hole 60 provided in the hood 58. A locking protrusion 64 protrudes from the upper surface of the connector 22. The connector 22 is fixed to the hood 58 (i.e., the ECU 26) by inserting the connector 22 into the connector mounting hole 60 and locking the locking protrusion 64 into the locking hole 62. In other words, the portion of the mounting body (ECU 26) to which the connector 22 is attached is the hood 58 provided on the outside of the connector 22. By inserting and fixing the connector 22 into the hood 58, for example, the connector 22 is electrically connected to an electric circuit on the upper surface of the printed circuit board 44 via a terminal or the like protruding downward.

[0041] Here, since the connector mounting hole 60 in the hood 58 opens forward, the surfaces constituting the inner circumference of the hood 58 (the inner surfaces of the walls constituting both the upper and lower and the left and right sides of the hood 58) and the portion on the axis L of the exhaust path 16 where the thermal fuse 18 is attached (the portion where the fuse mounting hole 52 is formed) all extend in the front-to-rear direction and are parallel to each other. The length A (see FIG. 3) of overlap between the connector 22 and the hood 58 in the direction in which they extend parallel to each other (front-to-rear direction) is longer than the length B (see FIG. 3) of overlap between the thermal fuse 18 and the exhaust path 16 in that direction.

[0042] <Wire harness 24> As described above, the lead wires 49 extending from the respective ends of the thermal fuse 18 and the connector 22 are bound together with other electric wires by, for example, wrapping with tape to form an electric wire bundle, which constitutes the wire harness 24. In the wire harness 24, the end opposite to the end connected to the thermal fuse 18 and the connector 22 is connected to, for example, an external device (not shown).

[0043] In addition, each of the lead wires 49 that constitute the wire harness 24 and are connected to the thermal fuse 18 and the connector 22 preferably has, for example, a predetermined thickness and a certain degree of deformation rigidity. This allows, for example, each of the lead wires 49 to have a rigidity that does not bend naturally and allows an operator to deform it as desired. As a result, as shown in FIG. 4, for example, in a state before the thermal fuse 18 and the connector 22 are mounted in the fuse mounting hole 52 and the connector mounting hole 60, the distance and angle at which the thermal fuse 18 protrudes from the bundled portion of the wire harness 24 can be set as desired. In the first embodiment, the thermal fuse 18 and the connector 22 are located at appropriate distances and angles from the bundled portion of each of the lead wires 49 (wire harness 24), and the thermal fuse 18 and the connector 22 are fixed to each other via a bundle of electric wires.

[0044] <Abnormality determination unit 20> In the first embodiment, when an abnormality occurs in the battery 12 and the internal pressure rises, the gas inside the battery 12 is discharged and the thermal fuse 18 is melted. This causes the electrical connection between the printed circuit board 44 and the external device to be cut off, and this electrical connection is detected by, for example, a microcomputer mounted on the printed circuit board 44, which detects a change in voltage, current, etc., and transmits a signal generated in response to the detection of the disconnection to the outside of the battery system 10. Note that when the battery 12 is normal and the thermal fuse 18 is not melted, the microcomputer may transmit a signal to the outside indicating that the battery is normal, or may not transmit a signal when the battery is normal and transmit a signal to the outside when an abnormality occurs in the battery.

[0045] Therefore, the abnormality determination unit 20, which determines the presence or absence of an abnormality in the battery 12 based on a signal from the thermal fuse 18 (for example, a signal generated by cutting an electrical connection), is configured to include the printed circuit board 44. Therefore, in the first embodiment, the abnormality determination unit 20 is provided in the ECU 26, which is the body to which it is attached.

[0046] <Assembly of Battery System 10> The following describes a specific example of a method for assembling the battery system 10. Note that the method for assembling the battery system 10 is not limited to the embodiment described below.

[0047] First, a plurality of batteries 12 are prepared. The plurality of batteries 12 are arranged in the front-rear direction to form a battery group 28, and the positive and negative electrodes protruding upward from each battery 12 are connected by a bus bar module 30. The battery group 28 and bus bar module 30 are housed in a housing body 36, and the upper opening of the housing body 36 is closed with a lid 38, and the housing body 36 and the lid 38 are fixed together.

[0048] The printed circuit board 44 is housed in the lower case 48, and the upper case 46 is attached to and fixed to the lower case 48 from above. The hood 58 is then inserted into the hood mounting hole 50 in the case 42 and fixed thereto, completing the ECU 26.

[0049] Meanwhile, the lead wires 49, each of which has a thermal fuse 18 and a connector 22 connected to its end, are bundled by wrapping tape to form the wire harness 24. Thereafter, the ECU 26 is fixed onto the housing 34, and then the thermal fuse 18 and the connector 22 are inserted into the fuse mounting hole 52 and the connector mounting hole 60 to attach the wire harness 24 to the ECU 26. Alternatively, the thermal fuse 18 and the connector 22 are inserted into the fuse mounting hole 52 and the connector mounting hole 60 to attach the wire harness 24 to the ECU 26, and then the ECU 26 is fixed onto the housing 34. In this way, the battery system 10 is completed.

[0050] According to the battery system 10 of the first embodiment having the above-mentioned structure, when an abnormality such as an internal short circuit occurs in the battery 12, the internal pressure increases, and the electrolyte sealed inside the battery 12 may turn into gas and be ejected. This gas is discharged to the outside through the exhaust path 16 communicating with the open part 14. The thermal fuse 18 is provided inside the exhaust path 16. Here, the gas ejected from the battery 12 is high in temperature, and is ejected to the thermal fuse 18, the melting temperature of which is set to 100°C, for example, to melt the thermal fuse 18. A signal accompanying the melting of the thermal fuse 18 is detected (or determined) by a microcomputer or the like (anomaly determination unit 20) mounted on the printed circuit board 44, for example, and a signal indicating that the thermal fuse 18 has been melted is transmitted to the outside. When this signal is received, light, sound, a message, or the like is emitted, so that the user (for example, the driver of the vehicle) can grasp the melting of the thermal fuse 18, that is, the abnormality of the battery 12.

[0051] In particular, in the first embodiment, the exhaust passage 16 extends in a substantially straight line, and gas ejected from the battery 12 can be ejected onto the thermal fuse 18 while relatively suppressing a drop in temperature. As a result, the thermal fuse 18 melts stably, and abnormalities in the battery 12 can be detected more reliably. In the first embodiment, the case 42 of the ECU 26, which is the mounting body, is provided with a fuse mounting hole 52 and a connector mounting hole 60, and the thermal fuse 18 and the connector 22 are attached to a common wire harness 24 (wire bundle) via respective drawn electric wires 49. Therefore, the efficiency of the installation work of the thermal fuse and the connector can be improved compared to the case where the thermal fuse and the connector provided at the ends of separate electric wires are individually installed into the fuse mounting hole and the connector mounting hole. Furthermore, for example, compared to when the temperature fuse 18 and the connector 22 are fixed to the wire harness 24 (each of the pull-out wires 49) by wrapping tape, the pull-out direction and shape of the wire harness 24 (each of the pull-out wires 49) from the temperature fuse 18 and the connector 22 can be easily changed, making it easier to design the path and perform the wiring work of the wire harness 24.

[0052] Furthermore, the connector 22 is attached to the mounting body (ECU 26) at a position where the exhaust path 16 does not pass through. Specifically, the ECU 26 is installed at a position facing vertically upward with respect to the battery 12, and in this ECU 26, the connector 22 is installed at a position facing vertically upward from the thermal fuse 18. By adopting such an embodiment, even when high-temperature gas is discharged through the exhaust path 16, the connector 22 is prevented from being affected by the heat of the gas.

[0053] In addition, for example, by each of the drawn electric wires 49 drawn out from the wire harness 24 having a certain degree of deformation rigidity, the respective angles and distances of the thermal fuse 18 and the connector 22 from the electric wire bundle can be appropriately set in the wire harness 24 before the thermal fuse 18 and the connector 22 are attached. This allows the thermal fuse 18 and the connector 22 to be fixed to each other. As a result, for example, by attaching the connector 22 to the connector attachment hole 60 prior to attaching the thermal fuse 18 to the fuse attachment hole 52, the thermal fuse 18 can be positioned near the fuse attachment hole 52, making it easy to attach the thermal fuse 18 to the fuse attachment hole 52. Alternatively, by attaching the thermal fuse 18 to the fuse attachment hole 52 prior to attaching the connector 22 to the connector attachment hole 60, it makes it easy to attach the connector 22 to the connector attachment hole 60.

[0054] In particular, in the mounting direction (front-rear direction) of the thermal fuse 18 and the connector 22 into the fuse mounting hole 52 and the connector mounting hole 60, the overlap length A between the connector 22 and the hood 58 is made longer than the overlap length B between the thermal fuse 18 and the exhaust path 16. By adopting this embodiment, when the connector 22 begins to be inserted into the hood 58, the thermal fuse 18 has not yet been inserted into the exhaust path 16, and the thermal fuse 18 can be positioned in the vicinity of the exhaust path 16 (fuse mounting hole 52). This improves the efficiency of assembling the thermal fuse 18 into the fuse mounting hole 52.

[0055] The abnormality determination unit 20 is provided in the body to which it is attached (ECU 26). The abnormality determination unit 20 includes, for example, a microcomputer mounted on a printed circuit board 44 that constitutes the ECU 26. By configuring the abnormality determination unit 20 in this manner, it is possible to provide the abnormality determination unit 20 relatively close to the thermal fuse 18, and thus to quickly detect the meltdown of the thermal fuse 18, enabling the user to grasp an abnormality in the battery 12 at an earlier stage.

[0056] The thermal fuse 18 can be engaged with an object to which it is attached (for example, the lower case 48 of the ECU 26). The thermal fuse 18 can be fixed to the ECU 26 by inserting the thermal fuse 18 into the fuse mounting hole 52 and engaging it. This also makes it possible to electrically connect the thermal fuse 18 to an electric circuit provided on the printed circuit board 44.

[0057] <Embodiment 2> A battery system 70 according to a second embodiment of the present disclosure will be described below with reference to Figures 6 and 7. In the first embodiment, the fuse mounting hole 52 in the ECU 26 is provided at a position different from the hood 58, but in the second embodiment, the fuse mounting hole 74 in the ECU 72 is provided in the hood 58. As a result, in the second embodiment, the connector 22 and the thermal fuse 18 are each attached to the same hood 58. The battery system 70 according to the second embodiment has a basic structure similar to that of the first embodiment, but differs from the first embodiment in the above points. Below, differences from the first embodiment will be described, and detailed descriptions of members and parts that are substantially the same as those in the first embodiment will be omitted by assigning the same reference numerals in the drawings as those in the first embodiment.

[0058] In the second embodiment, the hood 58 is provided across the upper case 46 and the lower case 48 of the ECU 72, but the present invention is not limited to this embodiment. The hood 58 may be provided on either the upper case 46 or the lower case 48. In the second embodiment, a fourth through hole 76 is formed in a lower wall of the hood 58 at a position corresponding to the first to third through holes 32, 40, 54. As a result, when the ECU 72 including the hood 58 is fixed to the upper surface of the housing 34 (the upper surface of the lid 38), the first to fourth through holes 32, 40, 54, 76 communicate with each other in the vertical direction. The inner diameter of the fuse mounting hole 74 is larger than the outer diameter of the thermal fuse 18, and when the thermal fuse 18 is mounted in the fuse mounting hole 74, a gap 78 is formed between the inner peripheral surface of the fuse mounting hole 74 and the outer peripheral surface of the thermal fuse 18. Therefore, in the second embodiment, the exhaust path 16 to which the gas discharged from the open portion 14 of the battery 12 is guided is configured to include the first to fourth through holes 32, 40, 54, 76 and the gap 78.

[0059] In particular, in the second embodiment, the insertion of the thermal fuse 18 into the hood 58 (fuse mounting hole 74) is restricted by the thermal fuse 18 abutting against a rear wall 80 of the hood 58. The wall 80 closes the entire rear end of the hood 58, preventing gas that rises from the battery 12 through the first to fourth through-holes 32, 40, 54, 76 from being discharged into the inside of the case 42 through the hood 58.

[0060] The battery system 70 of the second embodiment having the above-mentioned structure can also achieve the same effects as those of the first embodiment, since the only difference is the insertion position of the thermal fuse 18 compared to the battery system 10 of the first embodiment. In particular, in the second embodiment, for example, after the thermal fuse 18 and the connector 22 are attached to the hood 58, the hood 58 can be fixed to the case 42 of the ECU 72, improving the attachment efficiency of the thermal fuse 18 and the connector 22, and thus the assembly efficiency of the battery system 70.

[0061] <Embodiment 3> A battery system 90 according to a third embodiment of the present disclosure will be described below with reference to Fig. 8. The battery system 90 according to the third embodiment differs from the second embodiment in that the thermal fuse 18 penetrates a rear wall 80 of the hood 92 to reach the internal space of the case 42. That is, an insertion hole 94 through which the thermal fuse 18 is inserted is formed in the wall 80, and an end of the thermal fuse 18 is inserted into the insertion hole 94 and protrudes into the internal space of the case 42, so that the thermal fuse 18 is stably held.

[0062] The battery system 90 of embodiment 3 differs from the battery system 70 of embodiment 2 only in that the temperature fuse 18 penetrates the rear wall 80 of the hood 92 or not, and therefore can achieve the same effects as embodiment 2.

[0063] <Embodiment 4> A battery system 100 according to a fourth embodiment of the present disclosure will be described below with reference to FIGS. 9 and 10. The battery system 100 according to the fourth embodiment has a basic structure similar to that of the first embodiment, but is different in that a cylindrical portion 108 protruding downward is provided on the periphery of a third through hole 106 provided at the bottom of the fuse mounting hole 52 on the lower surface of the lower case 104 constituting the ECU 102. The cylindrical portion 108 has an inner hole penetrating in the vertical direction, and an upper opening of the cylindrical portion 108 opens to the inner surface of the fuse mounting hole 52. Therefore, the third through hole 106 is formed by the inner hole of the cylindrical portion 108. As in the first embodiment, the third through hole 106 is formed at a position corresponding to the first and second through holes 32, 40 in the busbar module 30 and the cover body 38.

[0064] The outer diameter of the cylindrical portion 108 is smaller than the inner diameter of the first and second through holes 32, 40. The length (vertical dimension) of the cylindrical portion 108 is approximately equal to or slightly shorter than the sum of the vertical dimensions of the first and second through holes 32, 40. As a result, when the ECU 102 is stacked and fixed on the upper surface of the housing 34, the cylindrical portion 108 enters the inner periphery of the first and second through holes 32, 40, and the lower opening of the cylindrical portion 108 faces the open portion 14 of the battery 12 in the vertical direction. As a result, in the fourth embodiment, the exhaust path 110 is formed by inserting the cylindrical portion 108 into the inner periphery of the first and second through holes 32, 40, and the exhaust path 110 is substantially configured by the third through hole 106 and the gap 53.

[0065] In the battery system 100 in the fourth embodiment, the portion constituted by the first to third through holes 32, 40, 54 in the first embodiment is constituted by the third through hole 106, so that the same effect as in the first embodiment can be achieved. In particular, in the fourth embodiment, when the ECU 102 is assembled to the housing 34, the cylindrical portion 108 is inserted into the first and second through holes 32, 40, so that the positional deviation in the horizontal direction (left-right direction or front-rear direction) between the ECU 102 and the housing 34 is suppressed, and the assembly efficiency is improved. In the fourth embodiment, the hood 58 is not provided on the outside of the connector 22, and the connector mounting hole 60 is provided in the upper case 46. In this way, the hood is not essential in the battery system according to the present disclosure, and the connector may be directly attached to the mounting body (for example, the upper case of the ECU). In addition, the connector mounting hole 60 may be provided in only one of the upper case 46 and the lower case 48, or may be provided across both.

[0066] <Modification> Although the first to fourth embodiments have been described above as specific examples of the present disclosure, the present disclosure is not limited to these specific descriptions. Modifications, improvements, etc., within the scope of achieving the object of the present disclosure, are included in the present disclosure. For example, the following modified examples of the embodiments are also included in the technical scope of the present disclosure.

[0067] (1) In the above embodiment, a plurality of batteries 12 are provided to constitute the battery group 28, but the number of batteries may be one. When a plurality of batteries are provided, an exhaust path may be provided at a position corresponding to the open part of one battery (for example, the battery located at the frontmost position) as in the above embodiment, or one or more exhaust paths may be provided to collect and guide gas discharged from each open part of the plurality of batteries, or multiple exhaust paths may be provided corresponding to each open part of the plurality of batteries. When multiple exhaust paths are provided, a separate thermal fuse may be attached in each exhaust path, or one thermal fuse may be attached across at least two of the multiple exhaust paths.

[0068] (2) The specific structures of the housing and the mounting body are not limited. The housing may be composed of a bottom plate located below and a substantially box-shaped housing body that is provided above the bottom plate and opens downward, and the second through hole may be provided in the upper bottom wall of the housing body. In addition, the mounting body is not limited to a structure consisting of an upper case, a lower case, and a circuit configuration such as a printed circuit board, and when the housing that houses the battery is formed from a synthetic resin, the cover and the lower case of the housing may be formed integrally. Furthermore, each of the through holes that form the exhaust path (for example, the first to third through holes 32, 40, 54 in the first embodiment) does not need to be circular, and various shapes such as polygonal shapes such as triangles and rectangles, and circular shapes such as ellipses and ovals can be adopted.

[0069] (3) In the above embodiment, the abnormality determination unit 20 includes, for example, a microcomputer mounted on the printed circuit board 44, but is not limited to this. The abnormality determination unit that determines the presence or absence of an abnormality in the battery may be provided, for example, outside the body to which it is attached (for example, an ECU), or the microcomputer or the like that constitutes the abnormality determination unit may be provided outside the body to which it is attached and connected to an electric circuit on the printed circuit board by an electric wire or the like.

[0070] (4) The mounting positions of the thermal fuse and the connector relative to the mounting object are not limited. For example, in the first embodiment, the thermal fuse 18 is mounted to the lower case 48 constituting the lower portion of the ECU 26, and the connector 22 is mounted across the upper case 46 and the lower case 48 constituting the ECU 26, but this is not limited to the above. Both the thermal fuse and the connector may be mounted on either the upper case or the lower case, with or without a hood, or may be mounted across both the upper case and the lower case.

[0071] (5) In the fourth embodiment, the cylindrical portion 108 protruding downward from the lower case 104 may be adopted in combination with at least one of the aspects of the first to third embodiments.

[0072] (6) In the above embodiment, an example of the battery system 10, 70, 90, 100 in which the thermal fuse 18 is attached to the ECU 26, 72, 102 in the exhaust passage 16, 110 passing through the ECU 26, 72, 102 is the attachment body is shown, but the battery system of the present disclosure is not limited to this. That is, the battery system of the present disclosure may be configured such that the thermal fuse is attached to the housing that houses the battery in a state in which the distance from the attachment body is restricted in the exhaust passage that passes through the housing, which also solves the problem of the present disclosure.

[0073] Specifically, as in the battery system 120 shown in Figs. 11 to 13, the temperature fuse 18 may be provided in a lid 124 of a housing 122. That is, in the first to fourth embodiments, the mounting body is constituted by the ECU 26, 72, 102, but as in the aspect shown in Figs. 11 to 13, the mounting body may be constituted by an ECU 126 and a housing 122. The basic structure of this aspect is the same as that of the first embodiment, and the first through hole 32 is formed in the busbar module 30 at a position corresponding to the open portion 14 of the battery 12, and the second through hole 128 is formed in the lid 124 at a position corresponding to the first through hole 32. That is, the mounting body in the battery system of the present disclosure may be constituted by any member as long as it is installed on the battery and a wire harness having a temperature fuse and a connector is attached to it. For example, as in this embodiment, when the ECU 126 to which the wire harness 24 is attached is installed in the lid 124 of the housing 122 that houses the multiple batteries 12, the mounting target can be configured as a complex including the ECU 126 and the lid 124 of the housing 122. Then, the connector 134 can be attached to the ECU 126, which is one member constituting the complex, and the thermal fuse 18 can be attached to the lid 124, which is the other member constituting the complex.

[0074] Here, a fuse mounting groove 130 that opens upward is provided on the upper surface of the lid 124, and the thermal fuse 18 can be accommodated and disposed therein. The second through hole 128 is provided at the bottom of the fuse mounting groove 130, and the upper opening of the second through hole 128 opens to the bottom surface of the fuse mounting groove 130. This allows the second through hole 128 and the fuse mounting groove 130 to communicate with each other, and by attaching the housing 122 to the battery group 28 and the busbar module 30, the first through hole 32 and the second through hole 128 provided in the busbar module 30 are communicated with the fuse mounting groove 130.

[0075] Therefore, in this embodiment, the exhaust path 132 to which the gas discharged from the open portion 14 is guided is configured to include the first through hole 32, the second through hole 128, and the fuse mounting groove 130. The melting of the thermal fuse 18 may be detected (determined) by, for example, an external device connected to the wire harness 24 or a microcomputer mounted on the printed circuit board 44. In this embodiment, the ECU 126 is provided on the upper surface of the lid 124 at a position away from the fuse mounting groove 130.

[0076] On the other hand, the connector 134 is attached across the upper case 46 and the lower case 48 via the hood 58, but the connector may be attached to either the upper case or the lower case with or without the hood. A pressing portion 136 that protrudes downward is integrally formed on the end (front end) of the connector 134 opposite to the side inserted into the hood 58. When the connector 134 is attached to the hood 58, the pressing portion 136 is located above the thermal fuse 18 attached to the fuse attachment groove 130. This pressing portion 136 can prevent the thermal fuse 18 from falling out of the fuse attachment groove 130.

[0077] The battery system 120 in this embodiment having the above-described structure can also achieve the same effects as those of the above-described embodiment. Even when the mounting target is mounted above the housing as in the above-described embodiment, or when the mounting target is configured to include a housing as in this embodiment, the mounting target is not limited to an ECU, and may be any in-vehicle device.

[0078] (7) In the above embodiment, an example of a battery system that uses a temperature fuse to determine whether or not there is an abnormality in the battery is shown, but the battery system of the present disclosure is not limited to this. That is, the battery system of the present disclosure can be realized using a non-returnable switch that operates at a certain temperature or higher, and the present disclosure can be realized by using a non-returnable switch that operates at a certain temperature or higher, for example, a non-returnable switch using a bimetal, in addition to the example temperature fuse. In short, the battery system of the present disclosure also includes the following battery systems. (Another aspect of the present disclosure) A battery having an opening through which internal gas can be discharged when the internal pressure increases; an exhaust path through which the gas exhausted from the opening is guided; a non-returnable switch provided at a position in the exhaust path through which the gas passes; an abnormality determination unit that determines whether or not there is an abnormality in the battery based on a signal from the non-returnable switch; a mounting body to which a wire harness having the non-returnable switch and a connector is attached, the wire harness being disposed relative to the battery; A portion of the exhaust passage passes through the mounting body, the non-returnable switch is attached to the mounting body in the exhaust path passing through the mounting body, The connector is attached to the mounting body at a position where the exhaust path does not pass. Battery system. However, the switch is not limited to a non-reset type switch, and a reset type switch such as a thermistor may also be used.

[0079] (8) In the above embodiment, an example of the battery system of the present disclosure is shown, but the present disclosure can also be provided as a battery system component used in a battery system for solving the same problem. In short, the present disclosure also includes battery system components described in the following further aspects. (Still another aspect of the present disclosure) A battery system component that is assembled to a battery having an opening through which internal gas is discharged when internal pressure increases, to constitute a battery system, an exhaust path through which the gas exhausted from the opening is guided; a thermal fuse provided at a position in the exhaust path through which the gas passes; an abnormality determination unit that determines whether or not there is an abnormality in the battery based on a signal from the thermal fuse; a mounting body to which a wire harness having the thermal fuse and a connector is attached, the wire harness being disposed relative to the battery; A portion of the exhaust passage passes through the mounting body, the thermal fuse is attached to the object to be attached at the exhaust path passing through the object to be attached, The connector is attached to the mounting body at a position where the exhaust path does not pass. Battery system components. [Explanation of symbols]

[0080] 10 Battery system (embodiment 1) 12 batteries 14 Open area 16 Exhaust duct 18 Thermal fuse 20 Abnormality determination section 22 Connectors 24 Wire harness 26 ECU (mounted object) 28 Battery group 30 Busbar module 32 First through hole 34 Case 36 Main unit 38 Lid 40 Second through hole 42 cases 44 Printed Circuit Board 46 Upper Case 48 Lower Case 49 Outgoing wire 50 Hood attachment hole 52 Fuse mounting hole 53 Gap 54 Third Through Hole 56 Slit 58 Food 60 Connector mounting hole 62 Locking hole 64 Locking protrusion 70 Battery system (embodiment 2) 72 ECU (mounted object) 74 Fuse mounting hole 76 4th Through Hole 78 Gap 80 Wall 90 Battery system (embodiment 3) 92 Food 94 Insertion hole 100 Battery system (embodiment 4) 102 ECU (mounted object) 104 Lower Case 106 3rd Through Hole 108 Cylindrical part 110 Exhaust duct 120 Battery system (another aspect) 122 Housing (mounting body) 124 Lid 126 ECU (mounted object) 128 Second Through Hole 130 Fuse mounting groove 132 Exhaust duct 134 Connector 136 Clamp L axis

Claims

1. A battery having an opening through which internal gas can be discharged when the internal pressure increases; an exhaust path through which the gas exhausted from the opening is guided; a thermal fuse provided at a position in the exhaust path through which the gas passes; an abnormality determination unit that determines whether or not there is an abnormality in the battery based on a signal from the thermal fuse; a mounting body to which a wire harness having the thermal fuse and a connector is attached, the wire harness being disposed relative to the battery; A portion of the exhaust passage passes through the mounting body, the thermal fuse is attached to the object at the exhaust path passing through the object, The connector is attached to the mounting body at a position where the exhaust path does not pass. Battery system.

2. the mounting object is disposed in a position facing upward in a vertical direction relative to the battery, the connector is attached to the mounting body at a position vertically upward from the thermal fuse; The battery system according to claim 1 .

3. The thermal fuse is fixed to the connector. The battery system according to claim 1 or 2.

4. a hood provided on the outer side of the connector, the hood being a portion of the mounting base to which the connector is attached; the axis of the exhaust passage at the portion where the thermal fuse is attached is parallel to a surface that constitutes the inner periphery of the hood, The length of overlap between the connector and the hood in the axial direction is a length longer than the length of overlap between the thermal fuse and the exhaust passage in the axial direction; The battery system according to claim 3 .

5. The abnormality determination unit is provided on the mounting body. The battery system according to claim 1 or 2.

6. The thermal fuse is engageable with the object to be attached. The battery system according to claim 1 or 2.

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