CN110350263B - Temperature measuring structure of battery pack - Google Patents
Temperature measuring structure of battery pack Download PDFInfo
- Publication number
- CN110350263B CN110350263B CN201910258903.2A CN201910258903A CN110350263B CN 110350263 B CN110350263 B CN 110350263B CN 201910258903 A CN201910258903 A CN 201910258903A CN 110350263 B CN110350263 B CN 110350263B
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- Prior art keywords
- bus bar
- plate
- battery pack
- jig
- temperature detection
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- 238000009529 body temperature measurement Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims description 38
- 238000003466 welding Methods 0.000 claims description 4
- 239000000523 sample Substances 0.000 abstract description 27
- 239000002184 metal Substances 0.000 description 6
- 239000011796 hollow space material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/146—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations arrangements for moving thermometers to or from a measuring position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a temperature measuring structure of a battery pack, which can restrain external force acting on a bus bar to the minimum degree and stably install a temperature detecting component. The temperature measurement structure (1) comprises: a plate-shaped cover (9) which is positioned with a predetermined interval with respect to the bus bar (4) by being attached to the laminated body case; and a jig (20) attached to the plate-like cover (9), wherein the thermistor main body (6) is pressed against the bus bar (4) by an elastic body (45) through a probe case (41) of the jig (20).
Description
Technical Field
The present invention relates to a temperature measurement structure of a battery pack mounted on, for example, an automobile.
Background
Conventionally, an assembled battery mounted on an automobile or the like has a cell stack in which a plurality of cells are stacked, and a sensor for measuring the temperature of the cell stack is mounted. The methods of mounting the sensors are various. For example, a jig described in patent document 1 below presses a sensor against a bus bar (japanese: バスバ) that electrically connects the cells to each other. The jig covers the sensor in a state where the sensor is in contact with the bus bar, and is directly attached to the bus bar. In the structure described in patent document 2, a locking portion is formed in the sensor, and the locking portion is attached to a module covering the battery cell. The sensor is pressed directly against the cell.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-183906
Patent document 2: japanese patent No. 5360951
Disclosure of Invention
Problems to be solved by the invention
According to patent document 1, since the bus bar is pressed against the sensor by the jig and the jig is attached to the bus bar as described above, the bus bar may be deformed by an increase in the pressing force generated by pressing against the sensor and the pressing force generated by being sandwiched between the jig. Although the deformation of the bus bar can be prevented by increasing the thickness of the bus bar, the weight of the bus bar increases accordingly, and the material cost also increases.
On the other hand, according to patent document 2, since the sensor is directly pressed against the cell as described above, the sensor cannot be stably mounted to the thin cell.
The present invention has been made in view of such circumstances. That is, an object is to provide a temperature measurement structure of a battery pack in which a temperature detection member can be stably mounted while suppressing an external force acting on a bus bar to a minimum.
Means for solving the problems
In order to achieve the above object, a temperature measurement structure of an assembled battery according to the present invention is a temperature measurement structure of an assembled battery in which a temperature detection member is in contact with a bus bar that electrically connects a plurality of unit cells constituting a unit cell laminate to each other, the temperature measurement structure including: a plate-shaped member that is attached to the cell stack body and is positioned with a predetermined space from the bus bar; and an elastic body that is provided on the plate-shaped member, and that is in contact with the temperature detection means to press the temperature detection means against the bus bar.
In the temperature measurement structure of a battery pack according to the present invention, the plate-shaped member includes: a plate-shaped cover that covers the bus bar from a side opposite to the single cell stack body with respect to the bus bar; and a jig having the elastic body and attached to the plate-shaped cover.
The temperature measuring structure of the battery pack according to the present invention is characterized in that the plate-shaped cover is provided with a through hole penetrating through the front and back (in japanese language: watch coating), the jig has an engaging portion engaging with the outer periphery of the through hole, the jig is inserted into the through hole from the side opposite to the bus bar with respect to the plate-shaped member, and the engaging portion is engaged with the outer periphery of the through hole and attached to the plate-shaped cover.
In the temperature measurement structure of the battery pack according to the present invention, the temperature detection member is attached to the jig so as to be swingable in a direction toward or away from the bus bar, and the elastic body is attached to the jig so as to apply a pressing force to the temperature detection member.
In the temperature measurement structure of the battery pack according to the present invention, the temperature detection member is substantially rectangular parallelepiped having a short side and a long side, and a surface including the long side is a contact surface that contacts the bus bar.
In the temperature measurement structure of the battery pack according to the present invention, the bus bar is connected to the terminal of the single cell by welding, and the temperature detection member is in contact with a portion of the bus bar other than the portion welded to the terminal.
In the temperature measurement structure of the battery pack according to the present invention, the power generating element of the single cell is housed inside a bag-shaped package formed of a laminated film.
Effects of the invention
The temperature measurement structure of the battery pack of the present invention includes: a plate-like member that is positioned at a predetermined interval with respect to the bus bar by being attached to the cell stack; and an elastic body provided to the plate-like member and contacting the temperature detection member to press the temperature detection member against the bus bar. That is, the temperature detection member is pressed against the bus bar via an elastic body by a plate-shaped member attached to the cell laminate. With this configuration, only the pressing force generated by pressing the temperature detection member against the bus bar by the elastic force of the elastic body acts on the bus bar, and the reaction force acts on the cell laminated body via the plate-shaped member. Therefore, the external force acting on the bus bar can be suppressed to the minimum. Therefore, the thickness of the bus bar can be reduced, and the weight and material cost of the bus bar can be reduced. In addition, since the temperature detection member is in contact with the bus bar, the temperature detection member can be stably mounted.
In the temperature measurement structure of the battery pack according to the present invention, the plate-shaped member includes: a plate-shaped cover that covers the bus bar from the side opposite to the single cell stacked body with respect to the bus bar; and a clip having an elastic body and attached to the plate-like cover. Thus, the structure of the plate-like member can be simplified.
In the temperature measuring structure of the battery pack according to the present invention, the plate-shaped cover is provided with a through hole penetrating through the front and back, the jig has an engaging portion engaging with the outer periphery of the through hole, the through hole is inserted from the side opposite to the bus bar with respect to the plate-shaped member, and the engaging portion is attached to the plate-shaped cover by engaging with the outer periphery of the through hole. With this configuration, the bus bar can be viewed through the through hole in a state where the bus bar is covered with the plate-like member, so that an operator can mount the jig to the plate-like member by looking into the through hole. Therefore, short-circuiting of the bus bar and the like can be prevented in the mounting work of the jig. In addition, since the temperature detection member is attached to and detached from the plate-like member together with the jig in a state where the bus bar is covered with the plate-like member, the temperature detection member can be easily attached to and detached from the plate-like member, and maintenance can be easily performed.
In the temperature measurement structure of the battery pack according to the present invention, the temperature detection member is attached to the jig so as to be swingable in a direction toward or away from the bus bar, and the elastic body is attached to the jig so as to apply a pressing force to the temperature detection member. With this configuration, the temperature detection member can be appropriately pressed against the bus bar in accordance with the distance between the bus bar and the plate-like member. That is, the elastic body can flexibly cope with a wide or narrow interval between the bus bar and the plate-like member.
In the temperature measurement structure of the battery pack according to the present invention, the temperature detection member has a substantially rectangular parallelepiped shape having a short side and a long side, and a surface including the long side serves as a contact surface with the bus bar. That is, since the surface of the temperature detection member having a large area is in contact with the bus bar, the temperature can be accurately measured in a stable state.
In the temperature measurement structure of the battery pack according to the present invention, the bus bar is connected to the terminals of the single cells by welding, and the temperature detection member is in contact with the bus bar at a portion other than the portion welded to the terminals. That is, the temperature detection member is in contact with a wide portion other than the portion welded to the terminal, and therefore the contact area between the temperature detection member and the bus bar is large. Thus, the temperature can be accurately measured in a stable state.
In the temperature measurement structure of the battery pack according to the present invention, the power generating element of the single cell is housed inside the bag-like package formed of the laminated film. That is, even when the gap between the cells is narrow or the outer package of the cells has no rigidity, the temperature can be measured reliably.
Drawings
Fig. 1 is a sectional view of a temperature measurement structure of a battery pack according to an embodiment of the present invention.
Fig. 2 shows the appearance of the jig used in the temperature measurement structure of the battery pack according to the embodiment of the present invention, (a) is a front view seen from the front side, (b) is a rear view seen from the rear side of the side surface, (c) is a side view seen from the side, and (d) is a front view seen from the front side of the side surface, and (e) is a rear view seen from the rear side.
Fig. 3 is a cross-sectional view of a jig used in a temperature measurement structure of a battery pack according to an embodiment of the present invention, which is an enlarged sectional view taken along line a-a in fig. 2 (a).
Fig. 4 is a cross-section of a jig used in the temperature measurement structure of the battery pack according to the embodiment of the present invention, which is an enlarged cross-sectional view B-B in fig. 2 (c).
Fig. 5 is a cross-sectional view of a modification of the jig used in the temperature measurement structure of the battery pack according to the embodiment of the present invention.
Detailed Description
Hereinafter, a temperature measurement structure of a battery pack according to an embodiment of the present invention (hereinafter, the temperature measurement structure of the battery pack will be referred to as "temperature measurement structure") will be described with reference to the drawings. Fig. 1 shows a cross section of a temperature measuring structure 1, and fig. 2, 3, and 4 show a jig used in the temperature measuring structure 1. In the following description, as shown in fig. 1, front and rear sides of the cell stack 2 are defined in a state where the cell stack is placed on a plane so that the terminals (not shown) of the cells 3 are positioned on the upper side.
As shown in fig. 1, the temperature measurement structure 1 has a temperature detection member 5 in contact with a bus bar 4, and the bus bar 4 electrically connects a plurality of cells 3 constituting a cell laminate 2 to each other. The single cell 3 is, for example, a nickel-hydrogen secondary battery, a lithium-ion secondary battery, an organic radical battery, or the like. The cell 3 includes, as a power generating element (not shown), an electrode laminate in which positive and negative electrodes are laminated with a separator interposed therebetween, and an electrolyte, and a positive electrode terminal and a negative electrode terminal are connected to the respective electrodes. Each terminal is exposed to the outside of the outer case as a housing. The single cells 3 may be of a laminate type in which a power generating element is housed inside a laminate film, other than a square type or a cylindrical type. The single cell 3 is mounted on a laminate case (not shown), and a positive electrode terminal exposed from the exterior body and a negative electrode terminal of another adjacent single cell 3 are connected in series via a bus bar 4. The bus bar 4 is a thin plate made of metal and is attached to the laminated body case. The bus bar 4 and the terminals of the single cells 3 are connected by welding. Further, a hole may be formed in the bus bar 4, and the bus bar and each terminal may be connected by inserting each terminal into the hole and fastening the terminal with a nut.
The temperature detection member 5 is, for example, a thermistor or the like, and is composed of a thermistor main body 6 and an electric wiring 7 connected to the thermistor main body 6. The thermistor main body 6 is a substantially rectangular parallelepiped having short sides and long sides.
The temperature measurement structure 1 includes a plate-like member 8 attached to the stack case of the cell stack 2. The plate-like member 8 is positioned with a predetermined space from the bus bar 4 by being attached to the laminated body case. The plate-shaped member 8 includes a plate-shaped cover 9 and a jig 20, the plate-shaped cover 9 covering the bus bar 4 from the front side, which is the side opposite to the cell stack 2 with respect to the bus bar 4, and the jig 20 is attached to the plate-shaped cover 9. Specifically, the plate-like cover 9 is formed with one or more through holes 10 penetrating through the front and back, and the jig 20 is inserted through the through holes 10.
Here, the jig 20 is explained based on the drawings. Fig. 2, 3, and 4 show the appearance and cross section of the jig 20 used in the temperature measurement structure 1. Fig. 5 shows a cross section of a modification of the jig 20.
As shown in fig. 2 to 4, the jig 20 has a flat plate-shaped surface portion 21, a hollow main body portion 29 connected to the back surface of the surface portion 21, and an electric wire holding portion 26 connected to the rear end of the surface portion 21, and includes a probe case 41 that is displaced relative to the main body portion 29, and an elastic body 45 that applies a pressing force to the probe case 41.
The surface portion 21 is a substantially rectangular flat plate and has a flange portion 22 extending outward from the main body portion 29. The surface portion 21 is formed with a plurality of holes penetrating through the front and back. The holes are long holes 23 long in the front-rear direction, a rear first hole 24 formed toward the rear, and a rear second hole 25. The harness holding unit 26 includes a protection unit 28 that covers the harness 7 of the temperature detection member 5, and a C-shaped clamping unit 27 that clamps the harness 7. The protective portion 28 is flat and extends rearward from the surface portion 21. The rear end of the protector 28 is formed with a clip 27.
The main body portion 29 has a pair of side surfaces, i.e., a first side surface portion 30 and a second side surface portion 31, facing each other, a front surface portion 32 connected to a front end of each side surface portion 30, 31, and an elastic body holding portion 33 formed inside each surface portion 30, 31, 32. The hollow space 35 formed by being surrounded by the face portions 30, 31, and 32 is open on the rear side and the back side. The side surface portions 30 and 31 have locking pieces 36 formed at lower ends thereof. The locking piece 36 projects toward the inside. Ribs 37, 38, 39 are formed on the respective face portions 30, 31, 32. The ribs 37, 38, 39 form engagement portions 40 protruding outward. Specifically, a portion of each of the side surface portions 30 and 31 near the rear is cut away to form a pair of first attachment and detachment ribs 37 and a pair of second attachment and detachment ribs 38. The attaching and detaching ribs 37, 38 are connected to the side surface portions 30, 31 on the same plane, and protrude to the front side through the rear holes 24, 25 of the surface portion 21. A portion of the front surface portion 32 is cut away to form a third attachment and detachment rib 39. The third detachable rib 39 is connected to the front surface portion 32 on the same plane, and protrudes to the front side through the long hole 23 of the surface portion 21. The elastic body holding portion 33 has a claw portion 34, and the claw portion 34 is disposed in the long hole 23 of the surface portion 21.
The elastic body 45 is, for example, a plate spring, and has a substantially U-shape in side view. The elastic body 45 includes a held portion 46 attached to the claw portion 34 of the body portion 29, and a pressing portion 47 connected to the held portion 46 and facing the held portion 46. The elastic body 45 is preferably made of metal, but may be made of any material that can be elastically deformed, for example, resin.
The probe case 41 is made of resin and has a substantially rectangular parallelepiped box shape. An accommodation space 42 is formed inside the probe case 41. The rear side of the probe case 41 is open to communicate with the accommodation space 42. The back side of the probe case 41 is opened to communicate with the housing space 42 and covered by a metal plate 43. The probe case 41 has a locking flange 44 extending from the front end toward the side. The locking flange 44 is disposed in the hollow space 35 of the body portion 29 and locked to the locking piece 36. In this state, the probe case 41 is pressed toward the back side by the elastic body 45. When the probe case 41 is pressed from the back side, the elastic body 45 is elastically deformed, and the probe case 41 freely swings with respect to the main body portion 29. The material of the probe case 41 is not limited to resin, and may be, for example, metal, but in consideration of the degree of freedom of molding of the probe case 41, resin is preferable as in the present embodiment.
As shown in fig. 5, the probe case 41 may be closed at the back side without the metal plate 43.
The jig 20 is formed as described above. Next, the assembly steps of the temperature measuring structure 1 will be described.
In fig. 1, the through hole 10 of the plate-like cover 9 is disposed in a portion of the bus bar 4 other than the portion to be welded to each terminal. The thermistor main body 6 is accommodated in the accommodating space 42 of the probe case 41. The probe case 41 is mounted to the jig 20 from the rear. At this time, the thermistor main body 6 is disposed to face the bus bar 4 so that the back surface including the long side becomes a contact surface with the bus bar 4. The harness 7 is routed from the rear of the jig 20 to the harness holding portion 26, and is sandwiched by the sandwiching portions 27.
The jig 20 in a state in which the temperature detection member 5 is mounted is inserted into the through hole 10 from the side opposite to the bus bar 4 with respect to the plate-like cover 9, i.e., the front side. At this time, the attaching and detaching ribs 37, 38, and 39 of the jig 20 are elastically deformed toward the hollow space 35, and when the jig 20 is attached to the plate-like cover 9, the attaching and detaching ribs 37, 38, and 39 return to their original positions by the elastic force, and the engaging portion 40 engages with the outer periphery of the through hole 10. At the same time, the probe case 41 is pressed from the bus bar 4 by being in contact with the bus bar 4, and the elastic body 45 is elastically deformed to dispose the probe case 41 in the hollow space 35. That is, the thermistor main body 6 is pressed against the bus bar 4 via the detector case 41 by the elastic body 45. The position pressed against the thermistor main body 6 is a portion of the bus bar 4 other than the portion welded to each terminal. The bus bar 4 may be welded to the terminals at a position pressed against the thermistor main body 6, but in consideration of reliable contact between the thermistor main body 6 and the bus bar 4, it is preferable to have a position other than the position welded to the terminals as in the present embodiment.
When the worker grasps the detachable ribs 37, 38, and 39 of the jig 20 and tilts the detachable ribs 37, 38, and 39 inward when the jig 20 is detached from the plate-like cover 9, the engagement portion 40 is disengaged from the outer periphery of the through hole 10, and the jig 20 is pulled out from the through hole 10.
The temperature measurement structure 1 is configured as described above. Next, the effects of the temperature measurement structure 1 will be described.
In the temperature measuring structure 1, the jig 20 is attached to the plate-like cover 9, and the plate-like cover 9 is attached to the laminated body case of the cell laminated body 2 with a predetermined gap with respect to the bus bar 4. The jig 20 includes the temperature detection member 5 via the elastic body 45. That is, the temperature detection member 5 is pressed against the bus bar 4 via the elastic body 45 by the plate-like cover 9 attached to the stack case of the cell stack 2. With this configuration, only the pressing force generated by pressing the thermistor main body 6 by the elastic force of the elastic body 45 acts on the bus bar 4, and the reaction force acts on the laminate case of the single cell laminate 2 via the plate-shaped cover 9. Thus, the external force acting on the bus bar 4 can be suppressed to the minimum. Therefore, the thickness of the bus bar 4 can be made thin, and the weight and material cost of the bus bar 4 can be suppressed. Further, since the thermistor main body 6 is configured to be in contact with the bus bar 4, the thermistor main body 6 can be stably mounted.
The temperature measurement structure 1 is assembled by using the plate-like cover 9 and the jig 20 to which the elastic body 45 is attached. Therefore, the temperature measurement structure 1 can be realized with a simple configuration.
In the temperature measuring structure 1, the plate-like cover 9 has a through hole 10 penetrating through the front and back, and the through hole 10 is disposed at a position facing the bus bar 4. The jig 20 is inserted into the through hole 10, and the thermistor main body 6 is pressed against the bus bar 4 via the probe case 41 by the elastic body 45. With this configuration, the bus bar 4 is recognized through the through hole 10 in a state where the bus bar 4 is covered with the plate-like cover 9, and the worker can mount the jig 20 to the plate-like cover 9 by looking into the through hole 10. Therefore, short-circuiting of the bus bar 4 and the like can be prevented in the mounting work of the jig 20. In addition, since the temperature detection member 5 is attached to and detached from the plate-shaped cover 9 together with the jig 20 in a state where the bus bar 4 is covered with the plate-shaped cover 9, it is possible to easily attach and detach and also to easily perform maintenance.
In the temperature measuring structure 1, the through-hole 10 is disposed in a portion of the bus bar 4 other than the portion to be welded to each terminal, and the thermistor main body 6 is pressed against this portion via the probe case 41 by the elastic body 45. That is, since the thermistor main body 6 is in contact with a wide portion except for the portion welded to the terminal, the contact area between the thermistor main body 6 and the bus bar 4 is large. Thus, the temperature can be accurately measured in a stable state.
In the temperature measurement structure 1, the probe case 41 is pressed toward the back side by the elastic body 45 in a state of being attached to the jig 20. When the probe case 41 is pressed from the back side, the elastic body 45 is elastically deformed, and the probe case 41 freely swings with respect to the main body portion 29. That is, the probe case 41 is swingable in a direction approaching the bus bar 4 or separating from the bus bar 4. With this configuration, the thermistor main body 6 can be appropriately pressed against the bus bar 4 in accordance with the interval between the bus bar 4 and the plate-like cover 9. That is, the elastic body 45 can flexibly cope with whether the distance between the bus bar 4 and the plate-like cover 9 is wide or narrow.
In the temperature measurement structure 1, the thermistor main body 6 is disposed so as to face the bus bar 4 so that the back surface including the long side becomes a contact surface with the bus bar 4, and the thermistor main body 6 is pressed against the bus bar 4 via the probe case 41 by the elastic body 45. That is, since the surface of the thermistor body 6 having a large area is in contact with the bus bar 4, the temperature can be measured accurately in a stable state.
In the temperature measurement structure 1, even in the case of the laminated cell 3 in which the power generating element is housed inside the laminated film, the cell 3 is mounted as the cell laminate 2 to the laminate case. That is, even in the laminate type without rigidity, the temperature can be measured reliably.
In another first embodiment (not shown) of the present invention, the probe case is not provided, and the elastic body is in direct contact with the thermistor main body, and the thermistor main body is pressed against the bus bar by the elastic body. In another second embodiment (not shown) of the present invention, the jig is not provided, and the elastic body is directly attached to the plate-like member. The other embodiments described above also achieve the same effects as those of the temperature measurement structure 1 described above.
The embodiments of the present invention have been described above in detail, but the present invention is not limited to the embodiments. The present invention can be modified in various ways without departing from the scope of the claims.
Description of the reference numerals
1. A temperature measurement structure (a temperature measurement structure of a battery pack); 2. a single cell laminate; 3. a single cell; 4. a bus bar; 5. a thermistor (temperature detecting means); 6. a thermistor main body; 7. an electric wiring; 8. a plate-like member; 9. a plate-shaped cover; 10. a through hole; 20. a clamp; 21. a surface portion; 22. a flange portion; 23. a long hole; 24. a rear first aperture; 25. a rear second aperture; 26. a harness holding section; 27. a clamping portion; 28. a protection part; 29. a main body portion; 30. a first side surface portion; 31. a second side surface portion; 32. a front surface portion; 33. an elastic body holding portion; 34. a claw portion; 35. a hollow space; 36. clamping a fixing sheet; 37. a first handling rib; 38. a second handling rib; 39. a third handling rib; 40. a fastening part; 41. a probe housing; 42. an accommodating space; 43. a metal plate; 44. a locking flange; 45. an elastomer; 46. a held portion; 47. a pushing part.
Claims (6)
1. A temperature measurement structure of an assembled battery in which a temperature detection member is brought into contact with a bus bar that electrically connects a plurality of unit cells constituting a unit cell laminate to each other,
the temperature measurement structure of the battery pack includes:
a plate-shaped member that is attached to the cell stack body and is positioned with a predetermined space from the bus bar; and
an elastic body provided in the plate-shaped member and contacting the temperature detection member to press the temperature detection member against the bus bar,
the plate-like member includes:
a plate-shaped cover that covers the bus bar from a side opposite to the single cell stacked body with respect to the bus bar; and
a clip having the elastic body and attached to the plate-shaped cover,
the plate-shaped cover is provided with a through hole which is through from the front to the back,
the jig has an engaging portion that engages with an outer periphery of the through hole, is inserted into the through hole from a side opposite to the bus bar with respect to the plate-shaped cover, and is attached to the plate-shaped cover by engaging with the outer periphery of the through hole.
2. The temperature measuring structure of a battery pack according to claim 1,
the engaging portion has a rib for disengaging the engaging portion from an outer periphery of the through hole.
3. The temperature measuring structure of the battery pack according to claim 1 or 2,
the temperature detection member is attached to the jig so as to be swingable in a direction of approaching or separating from the bus bar,
the elastic body is attached to the jig and applies a pressing force to the temperature detection member.
4. The temperature measuring structure of the battery pack according to claim 1 or 2,
the temperature detection member is substantially rectangular parallelepiped having a short side and a long side, and a surface including the long side is a contact surface that contacts the bus bar.
5. The temperature measuring structure of a battery pack according to claim 1 or 2,
the bus bar is connected to the terminals of the unit cells by welding,
the temperature detection member is in contact with a portion of the bus bar other than a portion welded to the terminal.
6. The temperature measuring structure of a battery pack according to claim 1 or 2,
the power generating element of the single cell is housed inside a bag-shaped package formed of a laminated film.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018072292A JP7109966B2 (en) | 2018-04-04 | 2018-04-04 | Assembled battery temperature measurement structure |
| JP2018-072292 | 2018-04-04 |
Publications (2)
| Publication Number | Publication Date |
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| JP2008298662A (en) * | 2007-06-01 | 2008-12-11 | Yazaki Corp | Attaching structure of temperature sensor |
| CN101925807A (en) * | 2008-01-25 | 2010-12-22 | 矢崎总业株式会社 | Module unit |
| JP2016018634A (en) * | 2014-07-07 | 2016-02-01 | 株式会社東芝 | Battery module |
| CN105321637A (en) * | 2014-07-29 | 2016-02-10 | 福特全球技术公司 | Thermistor assembly including elastomeric body |
| JP2016186045A (en) * | 2015-03-27 | 2016-10-27 | 日本ポリエチレン株式会社 | Polyethylene for thin-wall injection molding, and molded article using the same |
| JP2018045858A (en) * | 2016-09-14 | 2018-03-22 | 株式会社豊田自動織機 | Battery module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4528612B2 (en) | 2004-12-27 | 2010-08-18 | 矢崎総業株式会社 | Thermistor thermometer mounting structure |
| JP2016212948A (en) | 2015-04-28 | 2016-12-15 | 株式会社デンソー | Battery unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298662A (en) * | 2007-06-01 | 2008-12-11 | Yazaki Corp | Attaching structure of temperature sensor |
| CN101925807A (en) * | 2008-01-25 | 2010-12-22 | 矢崎总业株式会社 | Module unit |
| JP2016018634A (en) * | 2014-07-07 | 2016-02-01 | 株式会社東芝 | Battery module |
| CN105321637A (en) * | 2014-07-29 | 2016-02-10 | 福特全球技术公司 | Thermistor assembly including elastomeric body |
| JP2016186045A (en) * | 2015-03-27 | 2016-10-27 | 日本ポリエチレン株式会社 | Polyethylene for thin-wall injection molding, and molded article using the same |
| JP2018045858A (en) * | 2016-09-14 | 2018-03-22 | 株式会社豊田自動織機 | Battery module |
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| Publication number | Publication date |
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| CN110350263A (en) | 2019-10-18 |
| JP7109966B2 (en) | 2022-08-01 |
| JP2019185914A (en) | 2019-10-24 |
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