CN109891661B - Battery module having fixing structure for temperature sensing element - Google Patents
Battery module having fixing structure for temperature sensing element Download PDFInfo
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- CN109891661B CN109891661B CN201780066245.6A CN201780066245A CN109891661B CN 109891661 B CN109891661 B CN 109891661B CN 201780066245 A CN201780066245 A CN 201780066245A CN 109891661 B CN109891661 B CN 109891661B
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- battery
- circuit board
- battery cell
- printed circuit
- module
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- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- 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
- H01M10/04—Construction or manufacture in general
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- 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
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- 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
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- 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
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
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- 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/105—NTC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to a battery module. The battery module includes at least one battery cell and a rigid printed circuit board, and includes a protection circuit module electrically coupled with the battery cell, at least one temperature sensor disposed on a surface of the battery cell, and a flexible printed circuit board electrically connecting the protection circuit module and the temperature sensor.
Description
Technical Field
The present invention relates to a battery module having a special positioning for fixation between a temperature sensing element adapted for temperature measurement of battery cells and a protection circuit module.
Background
Unlike a primary battery, a rechargeable battery can repeatedly perform charge and discharge, while a primary battery provides only irreversible conversion of chemical energy into electrical energy. Low-capacity rechargeable batteries are used in small portable electronic devices such as mobile phones, notebook computers, and camcorders, and high-capacity rechargeable batteries may be used as motor driving power sources for hybrid vehicles and electric vehicles.
In general, a rechargeable battery includes an electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, a case accommodating the electrode assembly, and an electrode terminal electrically connected to the electrode assembly. An electrolyte solution is injected into the case so that the battery can be charged and discharged through electrochemical reactions of the positive electrode, the negative electrode, and the electrolyte solution. The shape of the case (e.g., cylindrical, rectangular, etc.) varies depending on the use of the battery.
A rechargeable battery may be used as a battery module having a plurality of battery cells connected in series and/or parallel, thereby providing high energy density required to drive a motor of a hybrid vehicle or the like. That is, the battery module is formed by connecting electrode terminals of a plurality of battery cells to achieve high output power required for an electric vehicle or the like.
The battery modules may be formed in a block or module design. In the block-type design, each cell is connected to a common current control structure and battery management system and is disposed in the housing as a unit. In a module-type design, a plurality of battery cells are connected to sub-modules, and a plurality of sub-modules are connected to form a module. The battery management functions may be implemented at least partially at the module level or sub-module level, and thus, compatibility may be improved. To form an electrical system, one or more battery modules are mechanically and electrically integrated, a thermal management system needs to be provided, and communication with one or more consumers of electricity is needed. Thermal management systems typically include a protection circuit module disposed adjacent to a battery cell.
Static control of battery power output and charging is not sufficient to meet the dynamic power demands of the various powered devices connected to the battery system. Therefore, it is necessary to continuously exchange information between the battery system and the control unit of the electric device. This information includes important information such as the actual state of charge (SoC), potential electrical performance, charge capacity and internal resistance of the battery system, and the actual or predicted power demand and surplus of the powered device. The temperature of the battery cells is defined as one parameter for controlling the state of each battery cell. Therefore, a temperature sensing element is provided in the battery module. Meanwhile, in a vehicle, there may be strong external impact, and thus some solutions have been proposed for holding the temperature sensing element at the surface of the battery cell. Such attempts have resulted in mechanically complex fixing structures by using a plurality of parts, which increase the manufacturing costs and material costs, thereby increasing the manufacturing costs of the battery module.
Disclosure of Invention
Technical problem
The present invention has been made in an effort to provide a battery module that can partially solve or eliminate the above disadvantages and can be formed through a simple manufacturing process using inexpensive members.
Technical scheme
According to the present invention, one or more disadvantages according to the conventional art can be overcome or reduced. Concretely, a battery module is provided, the battery module including at least one battery cell, a protection circuit module including a rigid printed circuit board and electrically connected with the battery cell, at least one temperature sensing element disposed at a surface of the battery cell, and a flexible printed circuit board electrically connecting the protection circuit module with the temperature sensing element
That is, an aspect of the present invention will relate to a module battery in which the function and position of a temperature sensing element provided at the surface of a battery cell can be ensured even when relative movement occurs between the battery cell and a protection circuit module due to external impact. Therefore, the manufacturing process should be simple to prevent an increase in manufacturing costs. To accomplish this, the temperature sensing element is directly disposed on the surface of the battery cell and then connected to the protection circuit module by using the flexible printed circuit board.
The flexible printed circuit is formed of a plurality of aligned conductors bonded to a thin insulating film. The flexible circuit requires less manual work during the assembly process and reduces the occurrence of errors in the manufacturing process. Flexible circuits have unique features that integrate form, fit, and function. The flex circuit eliminates the need for costly wiring, coverages, and soldering. Errors due to wiring can be eliminated and process costs can be reduced. However, the protection circuit module is not suitable for the implementation of a flexible printed circuit board, compared to a rigid circuit substrate providing high component density. Thus, the battery module according to the present invention combines the advantages of the rigid circuit and the flexible circuit.
According to an exemplary embodiment of the present invention, the rigid printed circuit board includes a slit through which the flexible printed circuit board extends from the temperature sensing element to a top surface of the rigid printed circuit board and is combined with the protection circuit module at the top surface of the rigid printed circuit board. That is, the connection between the temperature sensor and the protection circuit module is made at the upper surface of the rigid printed circuit board. The flexible printed circuit board passes through a dedicated slit in the rigid printed circuit board and does not pass through the outer edge of the rigid printed circuit board to the top surface. Therefore, the wiring patterns on the rigid printed circuit board and the flexible printed circuit board may easily contact each other at the upper side of the battery module through a typical bonding process such as soldering or the like.
According to another exemplary embodiment of the present invention, the battery module includes a foam member disposed between the bottom surface of the rigid printed circuit board and the temperature sensing element. The foam member may be formed of an electrically insulating material. Such a foam member can be easily provided at a predetermined position. For example, a flexible printed circuit board provided with a temperature sensing element at one end thereof may be fixed to the surface of the battery cell by an adhesive. Next, the foam member is disposed on the temperature sensing element, and thus, when the protection circuit module is mounted, the other end of the flexible printed circuit board passes through the slit. According to another manufacturing method of the present invention, the foam member may be formed by extruding the foam compound into a gap between the temperature sensing element and the rigid printed circuit board after the protective circuit module is mounted.
According to another exemplary embodiment of the present invention, a conductive adhesive layer is disposed between a surface of the battery cell and the temperature sensing element. Therefore, the position of the temperature sensing element may be fixed at the surface of the battery cell. Alternatively, the flexible printed circuit board may be soldered to the rigid printed circuit board. One end of the flexible printed circuit board, at which the temperature sensing element is disposed, passes through the slit and is then fixed to the rigid printed circuit board by the foam member. Next, the temperature sensing element is fixed to the foam member. When the rigid printed circuit board is assembled to the top surface of the battery cell, the temperature sensing element is pressed to the battery cell surface. The adhesive disposed between the temperature sensing element and the surface of the battery cell may ensure thermal contact. When the adhesive cures, the foam member ensures the required pressure of contact.
Another aspect of the present invention provides a vehicle including a battery module.
Further aspects of the invention can be derived from the dependent claims or the description to be described later.
Advantageous effects
According to the exemplary embodiments of the present invention, the temperature sensing element may be fixed to the surface of the battery cell by a simple structure and method. Therefore, the manufacturing cost of the battery module can be prevented from increasing.
Drawings
In the following detailed description, only certain exemplary embodiments of the present invention have been shown and described, simply by way of illustration.
Fig. 1 is a perspective view of a battery module.
Fig. 2 is a partial cross-sectional view of a battery cell according to the present invention.
Fig. 3 is a partially enlarged cross-sectional perspective view of the battery cell of fig. 2.
Fig. 4 is a partial perspective view of a battery module including a temperature sensing element coupled to a rigid printed circuit board through a flexible printed circuit.
Fig. 5 is a partial perspective view of a battery module including a temperature sensing element coupled to a rigid printed circuit board by a flexible printed circuit including a foam member.
Detailed Description
The essential features of the invention and the method for implementing the invention can be more easily understood in the following by referring to the detailed description of exemplary embodiments and the attached drawings. For clarity of description of the present invention, portions overlapping with the description are omitted, and like reference numerals denote like elements throughout the specification. The invention may be embodied in various other forms and therefore the invention is not necessarily limited to the embodiments shown in the drawings. These embodiments are means for fully and completely describing the features and various aspects of the present invention, and are provided as examples for helping those skilled in the art to fully understand. Therefore, unnecessary descriptions, i.e., unnecessary descriptions of processes, components, and techniques, will be omitted for those skilled in the art for a complete understanding of the features of the present invention. Throughout the specification, like reference numerals denote like elements, and a repetitive description of the same constituent elements will be omitted. In the drawings, several constituent elements, layers, and regions are exaggerated for clarity.
As shown in the figures, spatial expressions such as below, on, above, or above are intended to compare features of one component with respect to other components. On the other hand, since the components may have different orientations or may be arranged in different spaces according to the use or operation of the apparatus, the spatial expression is not necessarily limited by the illustrated aspects of the present invention. For example, if the orientation of the device shown in the drawings is reversed, one component described as being below, beneath, or lower with respect to another component would be oriented upper, above, or upper. Thus, expressions below and above may include both an upward direction and a downward direction. Further, the device may be understood to be disposed in various directions, such as being capable of rotating 90 degrees or another direction.
When a component or layer is referred to as being connected or coupled to another component or layer, the component or layer may be directly connected to the other component or layer or at least one other component or layer may be present between the component or layer and the other component or layer. Further, a component or layer may exist solely between two different components or layers, and at least one intermediate component or layer may be disposed between the components.
Although not specifically defined, all terms used herein, including technical terms and scientific terms, have meanings as understood by those of ordinary skill in the art. The terms have specific meanings in addition to the lexical meanings consistent with the relevant technical references and this specification. That is, the terms should not be interpreted to have an idealized or formal meaning.
Referring to fig. 1, a battery module 100 according to an exemplary embodiment includes a plurality of battery cells 10 arranged in one direction and a heat exchange member 110 disposed adjacent to bottom sides of the plurality of battery cells 10. A pair of end plates 18 are provided to face the side surfaces of the battery cells 10 on the outer sides of the battery cells 10, and a connecting plate 19 connects the pair of end plates 18 to fix the plurality of battery cells 10 together. The fastening parts 18a formed at the opposite sides of the battery module 100 are fixed to the support plate 31 by bolts 40. The support plate 31 is a part of the housing 30. Further, an elastic member 120 formed of rubber or another elastic material may be disposed between the support plate 31 and the heat exchange member 110.
Here, each battery cell 10 is a prismatic (or quadrangular) cell, and the wide planes of each cell are stacked to form a battery module. In addition, each battery cell 10 includes an electrode assembly and a battery case containing an electrolyte solution. The battery case is sealed by a cap assembly 14. The cap assembly 14 is provided with a positive electrode terminal 11, a negative electrode terminal 12, and an exhaust part 13. The positive terminal 11 and the negative terminal 12 have different polarities. The exhaust unit 13, which is a safety device of the battery cell 10, functions as a path for discharging gas generated in the battery cell 10 to the outside. The positive electrode terminal 11 and the negative electrode terminal 12 of the adjacent battery cell 10 are electrically connected by a bus bar 15, and the bus bar 15 may be fixed by a fastening means such as a nut 16. Therefore, the battery module 100 can be used as a power supply device by electrically connecting a plurality of battery cells 10 together. For the battery cell 10, a rechargeable battery such as a lithium secondary battery may be used. The battery module 100 may be a 48V battery used in vehicle related applications. Generally, the battery cell 10 generates a large amount of heat while performing charge and discharge. The generated heat is accumulated in the battery cell 10, and the deterioration of the battery cell 10 is accelerated. Accordingly, the battery module 100 includes the heat exchange member 110 disposed adjacent to the bottom side of the battery cell 10 to cool the battery cell 10. In addition, for safe operation of the battery module 100, a device for detecting the temperature of the battery cell 10 is included. Such a temperature detection device includes a protection circuit module and a temperature sensor (not shown in fig. 1).
Fig. 2 is a partial sectional view of a single battery cell 10 of the battery module 100 of fig. 1. Fig. 3 is a partially enlarged cross-sectional view of a region of the battery cell shown in fig. 2, in which temperature measurement with respect to the battery cell 10 is performed. Referring to fig. 2 and 3, the battery module 100 includes a protection circuit module 130 electrically connected to the battery cell 10. In addition, the protection circuit module 130 is electrically connected to the temperature sensing element 150 through the flexible printed circuit board 140.
Generally, each battery cell 10 in the battery module 100 is electrically connected to the protection circuit module 130. According to the present exemplary embodiment, only one protection circuit module 130 is connected to all the battery cells 10 in the battery module 100. However, two or more separate protection circuit modules may be connected to one battery cell or a group of battery cells.
The protection circuit module 130 is placed at the side surface of the battery cell 10 such that a gap is formed between the surface of the battery cell 10 and the surface of the protection circuit module 130 facing the battery cell 10. In the present exemplary embodiment, the protection circuit module 130 is disposed on the upper surface of the battery cell 10 in which the electrode terminals 11 and 12 are disposed. Specifically, the protection circuit module 130 is electrically connected with the battery cell 10 to control charging and discharging, and prevent overcharge/discharge of the battery cell 10.
The protection circuit module 130 includes a rigid printed circuit board 131 and at least one semiconductor element 133 disposed at an upper surface of the rigid printed circuit board 131, the rigid printed circuit board 131 having connection terminals 132a and 132b for connecting the terminals 11 and 12 of the battery cell 10. The semiconductor element 133 may include an integrated circuit formed to compare the measured temperature of the battery cell 10 with a threshold value of allowable battery cell temperature. The circuit board 131 includes a wiring pattern (not shown) formed on a surface thereof. The body of the circuit board 131 may be made of a rigid electrically insulating material such as Polyimide (PI) or Polyethylene (PET). The wiring pattern may be formed of an electrically conductive material such as copper (Cu), titanium (Ti), nickel (Ni), or palladium (Pd).
The connection terminals 132a and 132b may be formed by partially exposing the wiring pattern, or the connection terminals 132a and 132b may be formed by further providing a conductive material such as gold (Au) to the exposed portions of the wiring pattern, as implemented in the present exemplary embodiment.
The semiconductor element 133 applies a signal for controlling the operation of the battery cell 10. Specifically, the semiconductor element 133 controls charge and discharge through the high current line of the battery cell 10. In addition, the semiconductor element 133 applies signals indicating the voltage, current, and temperature of the battery cell 10 to prevent, for example, overcharge or overdischarge.
For this, the semiconductor element 133 applies temperature information of the battery cell 10 from the temperature sensing element 150 through the flexible printed circuit board 140 and controls the operation of the battery cell 10. Here, information on voltage, current, and temperature may be transmitted to the semiconductor element 133 through a wiring pattern of the circuit board 131.
The flexible printed circuit board 140 connects the temperature sensing element 150 disposed on the surface of the battery cell 10 and the protection circuit module 130. According to an exemplary embodiment of the present invention, each of the battery cells 10 of the battery module 100 includes at least one temperature sensing element 150 to individually measure the temperature of each battery cell 10. However, in some applications, at least two temperature sensing elements 150 may be sufficient in the battery module 100.
The flexible printed circuit board 140 includes a sensing line (not shown) for transmitting a signal from the temperature sensing element 150 connected thereto to the protection circuit module 130. Accordingly, the protection circuit module 130 may check the temperature value of the corresponding battery cell 10.
In addition, the flexible printed circuit board 140 extends between the protection circuit module 130 and the temperature sensing element 150. Since the flexible printed circuit board 140 can be easily bent, the connection between the components can be stably maintained even if the battery cell 10 or the protection circuit module 130 moves in the case 30. More specifically, the flexible printed circuit board 140 extends while passing through the slit 135 in the circuit board 131, and one end of the flexible printed circuit board 140 is electrically connected to the wiring pattern of the protection circuit module 130 at the top surface of the circuit board 131. Accordingly, a connector (not shown) that can contact the sensing lines of the flexible printed circuit board 140 may be provided with a conventional solder or the like on the top surface of the circuit board 131.
The temperature sensing element 150 is disposed at one side of the battery cell 10. The temperature sensing element 150 may be a temperature sensor, and when the temperature sensing element 150 is, for example, a negative characteristic (NTC) thermistor, the resistance value may decrease due to a negative temperature coefficient as the temperature of the battery cell 10 increases, but when the temperature sensing element 150 is set as a positive characteristic (PTC) thermistor, the resistance value increases as the temperature of the battery cell 10 increases. Since the temperature sensing element 150 reacts sensitively to temperature and thus the resistance of the temperature sensing element 150 varies according to the temperature, the protection circuit module 130 may control the charge and discharge of the battery cell 10.
In particular, the temperature sensing element 150 is provided as a chip thermistor. The chip thermistor can be simply connected to the circuit board 131 of the protection circuit module 130 through the flexible printed circuit board 140 by a solder mounting process, and thus, the number of processes can be reduced. Furthermore, such a solder mounting process may be automated.
In order to fix the temperature sensing element 150 to the top surface of the battery cell 10, a foam member 160 is disposed between the protection circuit module 130 and a portion of the flexible printed circuit board 140 supporting the temperature sensing element 150. Accordingly, the temperature sensing element 150 is pressurized to the top surface of the battery cell 10 by the foam member 160 interposed between the flexible printed circuit board 140 and the protection circuit module 130. Optionally, the temperature sensing element 150 may be fixed to the top surface of the battery cell 10 including the thermally conductive adhesive layer 170.
The foam member 160 may be formed of an electrically insulating material. The foam member 160 is preferably formed of a polymer material, such as an elastomer, in order to attenuate relative movement between the battery cell 10 and the protection circuit module 130. Materials used as the foam member include polyurethane and the like.
Fig. 4 is a partial perspective view of the battery module 100 including the temperature sensing element 150 coupled with the rigid printed circuit board 131 through the flexible printed circuit board 140. For convenience of description, the battery cell 10 and the foam member 160 are not shown in fig. 4, and the rigid printed circuit board 131 is semi-transparently illustrated by a dotted line. As shown in the drawing, the flexible printed circuit board 140 extends from the surface facing the battery cell to the surface facing away from the battery cell through the slit 135 of the rigid printed circuit board 131. The flexible printed circuit board 140 is bonded with a wiring pattern (not shown) at the top surface of the rigid printed circuit board 131.
Fig. 5 is a partial perspective view of the battery module 100 of fig. 4 additionally illustrating the foam member 160.
While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
< description of symbols >
10: battery cell 133: semiconductor device with a plurality of semiconductor chips
100: the battery module 135: slit
11. 12: electrode terminals 140: flexible printed circuit board
130: the protection circuit module 150: temperature sensing element
131: rigid printed circuit board 160: foam member
132a, 132 b: connection terminal 170: thermally conductive adhesive layer
Claims (6)
1. A battery module, comprising:
at least one battery cell;
a protection circuit module including a rigid printed circuit board and electrically connected with the battery cell;
at least one temperature sensing element disposed at a surface of the battery cell; and
a flexible printed circuit board electrically connecting the protection circuit module and the temperature sensing element,
wherein the rigid printed circuit board includes a slit, and
the flexible printed circuit board extends from the temperature sensing element to a top surface of the rigid printed circuit board through the slit and is combined with the protection circuit module at the top surface of the rigid printed circuit board.
2. The battery module of claim 1, comprising a foam member disposed between a bottom surface of the rigid printed circuit board and the temperature sensing element.
3. The battery module of claim 2, wherein the foam member is formed of an electrically insulating material.
4. The battery module of claim 2, wherein the foam member is configured to press the temperature sensing element at a top surface of the battery cell.
5. The battery module of claim 1, wherein a thermally conductive adhesive layer is disposed between a surface of the battery cell and the temperature sensing element.
6. A vehicle comprising the battery module of claim 1.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16195595.0A EP3316384B1 (en) | 2016-10-25 | 2016-10-25 | Battery module with a fixing for a temperature sensitive element |
| EP16195595.0 | 2016-10-25 | ||
| KR1020170122623A KR102410002B1 (en) | 2016-10-25 | 2017-09-22 | Battery module with a fixing for a temperature sensitive element |
| KR10-2017-0122623 | 2017-09-22 | ||
| PCT/KR2017/010554 WO2018080033A1 (en) | 2016-10-25 | 2017-09-25 | Battery module having fixing structure for temperature sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109891661A CN109891661A (en) | 2019-06-14 |
| CN109891661B true CN109891661B (en) | 2022-03-11 |
Family
ID=62023872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780066245.6A Active CN109891661B (en) | 2016-10-25 | 2017-09-25 | Battery module having fixing structure for temperature sensing element |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109891661B (en) |
| WO (1) | WO2018080033A1 (en) |
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| CN111430826B (en) * | 2018-12-21 | 2022-06-14 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN111435723B (en) * | 2019-01-11 | 2022-10-11 | 莫仕连接器(成都)有限公司 | Battery connection module |
| CN112151894B (en) * | 2019-06-28 | 2022-04-26 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN112490522A (en) * | 2019-09-12 | 2021-03-12 | 北京小米移动软件有限公司 | Battery protection module and method, battery and mobile terminal |
| CN210628444U (en) * | 2019-11-25 | 2020-05-26 | 宁德时代新能源科技股份有限公司 | Battery module, battery pack, and vehicle |
| US11695189B2 (en) | 2020-01-09 | 2023-07-04 | Samsung Sdi Co., Ltd. | Battery system with flexible printed circuit |
| KR102640844B1 (en) * | 2020-04-14 | 2024-02-27 | 삼성에스디아이 주식회사 | Battery pack |
| CN116632462A (en) | 2022-02-14 | 2023-08-22 | 莫仕连接器(成都)有限公司 | Battery connection module |
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| Publication number | Publication date |
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| CN109891661A (en) | 2019-06-14 |
| WO2018080033A1 (en) | 2018-05-03 |
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