CN209822826U - Sampling device of battery module and battery module - Google Patents

Sampling device of battery module and battery module Download PDF

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Publication number
CN209822826U
CN209822826U CN201921116211.6U CN201921116211U CN209822826U CN 209822826 U CN209822826 U CN 209822826U CN 201921116211 U CN201921116211 U CN 201921116211U CN 209822826 U CN209822826 U CN 209822826U
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CN
China
Prior art keywords
insulating film
sampling device
battery module
temperature
recessed
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Active
Application number
CN201921116211.6U
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Chinese (zh)
Inventor
李龙
唐彧
王鹏
陈兴地
游凯杰
汪用广
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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Priority to CN201921116211.6U priority Critical patent/CN209822826U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The embodiment of the application provides a sampling device and battery module of battery module, sampling device includes: a temperature collection assembly comprising a temperature sensor; a circuit board including a mounting portion to which the temperature sensor is fixed; a first insulating film arranged in a height direction with the circuit board; wherein the first insulating film includes a first recessed portion recessed toward the mounting portion, and the first recessed portion abuts against the mounting portion. In this application, can exert the effort towards the top cap through this first depressed part to the installation department, promote temperature sensor and top cap butt to make the temperature that temperature sensor surveyed more be close to the temperature of top cap, improve and adopt temperature accuracy and response speed, simultaneously, can also improve sampling device's structural strength and the reliability that sampling device and battery unit are connected electrically.

Description

Sampling device of battery module and battery module
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of energy storage devices, in particular to a sampling device of a battery module and the battery module.
[ background of the invention ]
The battery module comprises a plurality of battery units, and adjacent battery units are electrically connected through a bus bar. The heat generated in the working process of the battery unit is accumulated to cause the temperature of the battery module to rise, and the normal working temperature of the battery module is between minus 30 ℃ and 55 ℃, and the working efficiency of the battery module is reduced when the temperature exceeds the temperature range. Therefore, in order to make the battery module have higher efficiency, the temperature of the battery module needs to be controlled within the normal working temperature range as much as possible, and the premise of controlling the temperature is to acquire the temperature of the battery module in the working process.
At present, current battery module is provided with the temperature element of adopting that is used for gathering the temperature, should adopt the temperature element to include sheetmetal, temperature sensor and heat conduction glue, and wherein, sheetmetal and temperature sensor pass through heat conduction glue to be connected, and this sheetmetal still links to each other with the busbar to gather the temperature of busbar through the sheetmetal. Therefore, in the prior art, the temperature of the bus bar is regarded as the temperature inside the battery cell, but the temperature of the bus bar is different from the temperature inside the battery cell due to the influence of factors such as the bus bar flow area, and the temperature collection accuracy is low.
[ Utility model ] content
In view of this, the present application provides a sampling device for a battery module and a battery module, so as to solve the problem of low temperature collection accuracy in the prior art.
The embodiment of the application provides a sampling device of battery module, sampling device includes:
a temperature collection assembly comprising a temperature sensor;
a circuit board including a mounting portion to which the temperature sensor is fixed;
a first insulating film arranged in a height direction with the circuit board;
wherein the first insulating film includes a first recessed portion recessed toward the mounting portion, and the first recessed portion abuts against the mounting portion.
In one possible design, the circuit board includes a third body portion, the mounting portion is recessed with respect to the third body portion to form a third recessed portion, and a recessed direction of the third recessed portion is the same as a recessed direction of the first recessed portion;
at least part of the first recess is located within the third recess in the height direction.
In one possible design, the temperature collection assembly further comprises a reinforcement portion, and the temperature sensor is fixed to the reinforcement portion.
In one possible design, the first insulating film further includes a convex portion that is convex in a direction away from the mounting portion;
at least part of the reinforcement portion is located within the raised portion, and the first recessed portion abuts against the reinforcement portion.
In one possible design, the first recess has a first bottom wall, a portion of which protrudes in a direction away from the mounting portion, forming the protruding portion;
the first concave part surrounds the convex part, so that the first bottom wall is of an annular structure.
In one possible design, the sampling device further includes a second insulating film, and the first insulating film and the second insulating film are oppositely arranged in the height direction and fixedly connected;
the circuit board is located between the first insulating film and the second insulating film;
the first insulating film and the second insulating film are plastic films.
In one possible design, the second insulating film includes a second recess;
the second recess is in the same direction as the first recess, and at least part of the third recess is located in the second recess.
In a possible design, the second recess has a second bottom wall, and the second bottom wall is provided with a through hole;
the temperature collection assembly further comprises a heat conduction part, and the heat conduction part is positioned at one end, far away from the circuit board, of the second insulating film along the height direction;
the heat conducting part is abutted to the mounting part through the through hole.
In one possible design, the sampling device further includes a bus bar located between the circuit board and the second insulating film in a height direction;
the bus bar abuts against the mounting portion.
Simultaneously, this application embodiment still provides a battery module, battery module includes:
a battery cell having a top cover;
the sampling device is the sampling device of the battery module;
wherein, temperature sensor is used for gathering the temperature of top cap.
In the embodiment of the application, the first concave part which is concave towards the top cover is arranged on the first insulating film, and the first concave part is abutted against the installation part of the temperature sensor, so that acting force towards the top cover can be applied to the installation part through the first concave part, the abutting (including direct abutting or indirect abutting) of the temperature sensor and the top cover is promoted, namely, the distance between the temperature sensor and the top cover can be reduced, and the temperature measured by the temperature sensor is closer to the temperature of the top cover.
In the battery module of this application embodiment, because temperature sensor realizes the temperature acquisition to battery unit through the temperature of gathering battery unit's top cap, compare the temperature of gathering the busbar among the prior art, the temperature of top cap is close to the inside true temperature of battery unit more, the difference in temperature of the two also can be in the within range that can accept under abominable operating mode, therefore the temperature that temperature sensor gathered can more accurately reflect the inside true temperature of battery unit, do benefit to the discharge power who guarantees battery module.
Simultaneously, among this sampling device of battery module, the effort can be applyed to temperature sensor's installation department to the first depressed part of first insulating film to can restrict temperature sensor's position, promote to adopt temperature subassembly and top cap laminating, be favorable to guaranteeing the top cap and adopt temperature transmission route reliable and stable between the temperature subassembly, thereby do benefit to and ensure to adopt the temperature that the subassembly homoenergetic accuracy was gathered the top cap under all kinds of impact or vibration operating mode.
In addition, when the electrode assembly swells during the operation of the battery cell, the swelling force of the electrode assembly acts on the top cap and is transmitted to the sampling device, and the swelling force (upward) may cause the sampling device to be damaged or affect the reliability of the electrical connection between the sampling device and the battery cell.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the sampling apparatus of FIG. 1;
FIG. 3 is an enlarged view of a portion I of FIG. 2;
FIG. 4 is an exploded view of FIG. 3;
FIG. 5 is a schematic structural view of the first insulating film of FIG. 4;
FIG. 6 is a schematic view of the structure of the second insulating film in FIG. 4;
FIG. 7 is a schematic view of the circuit board and bus bar of FIG. 4;
FIG. 8 is a schematic structural view of the temperature collection assembly and the reinforcement part shown in FIG. 4;
FIG. 9 is a side view of FIG. 1 with the sampling device shown exploded;
FIG. 10 is an enlarged view of a portion II of FIG. 9 in a first embodiment;
FIG. 11 is an enlarged view of a portion III of FIG. 9;
fig. 12 is a partial enlarged view of section ii of fig. 9 in a second embodiment.
Description of reference numerals:
1-a battery cell;
11-a top cover assembly;
111-a top cover;
112-electrode terminals;
113-explosion-proof port;
12-an output pole;
2-a sampling device;
21-a temperature collection component;
211-a temperature sensor;
212-a heat conducting portion;
22-a reinforcement;
221-mounting holes;
222-glue material;
23-a first insulating film;
231-a first body portion;
232-a first recess;
232 a-first bottom wall;
232 b-a first side wall;
233-a projection;
233 a-top wall;
233b — a second sidewall;
24-a second insulating film;
241-a second body portion;
242 — a second recess;
243-second bottom wall;
243 a-through hole;
25-a circuit board;
251-a third body portion;
252-a third recess;
252 a-a mounting portion;
26-a bus bar;
27-connector.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
Referring to fig. 1 to 12, fig. 1 is a schematic structural diagram of a battery module provided in an embodiment of the present disclosure; FIG. 2 is a schematic diagram of the sampling apparatus of FIG. 1; FIG. 3 is an enlarged view of a portion I of FIG. 2; FIG. 4 is an exploded view of FIG. 3; FIG. 5 is a schematic structural view of the first insulating film of FIG. 4; FIG. 6 is a schematic view of the structure of the second insulating film in FIG. 4; FIG. 7 is a schematic view of the circuit board and bus bar of FIG. 4; FIG. 8 is a schematic structural view of the temperature collection assembly and the reinforcement part shown in FIG. 4; FIG. 9 is a side view of FIG. 1 with the sampling device shown exploded; FIG. 10 is an enlarged view of a portion II of FIG. 9 in a first embodiment; FIG. 11 is an enlarged view of a portion III of FIG. 9; fig. 12 is a partial enlarged view of section ii of fig. 9 in a second embodiment.
The present embodiment provides a battery module, as shown in fig. 1 and 9, the battery module includes a plurality of battery units 1 and a frame structure (not shown in the figure), wherein the battery units 1 may be secondary batteries capable of being repeatedly charged and discharged for use, the frame structure includes end plates, side plates, a top plate and a bottom plate that are connected to each other, the plurality of battery units 1 are located in an inner cavity of the frame structure and are stacked in the inner cavity, and the stacking direction may be a length direction X, a width direction Y or a height direction Z.
The battery cell 1 includes an electrode assembly, a cap assembly 11, and a case, wherein the case may have a hexahedral shape or other shapes, and a receiving chamber is formed inside the case to receive the electrode assembly and an electrolyte, one end of the case is open such that the electrode assembly can be placed in the receiving chamber of the case through the opening, and a plurality of electrode assemblies, which are stacked one on another, can be disposed in the receiving chamber. The housing may include a metal material, such as aluminum or aluminum alloy, and may also include an insulating material, such as plastic.
The electrode assembly comprises an electrode unit and a tab, the electrode unit comprises a positive pole piece, a negative pole piece and an isolating film, the isolating film is located between the adjacent positive pole piece and the negative pole piece and used for isolating the positive pole piece from the negative pole piece, the electrode assembly is used for generating electric energy, and the tab is used for outputting the electric energy generated by the electrode assembly.
As shown in fig. 4, the top cap assembly 11 includes a top cap 111 and two electrode terminals 112, the top cap 111 is fixed to an opening of a case of the battery cell 1 and is provided with an explosion-proof port 113 to enclose the electrode assembly and the electrolyte in a receiving cavity of the case, the electrode terminals 112 are disposed on the top cap 111 and include a positive electrode terminal 112 and a negative electrode terminal 112, and the two electrode terminals 112 are electrically connected to corresponding tabs, so that electric energy of the battery cell 1 can be output through the electrode terminals 112.
Meanwhile, the battery module further comprises a sampling device 2, wherein the sampling device 2 is used for collecting information such as temperature and voltage of the battery unit 1, so that the working state of the battery unit 1 is controlled according to the collected information.
The temperature of collecting the temperature through gathering the busbar among the battery module of current battery module is as the inside temperature of battery unit 1, and it has following shortcoming: the space size in the battery module is limited, and considering the manufacturing and cost influences, the width and thickness of the bus bar cannot be very large, and under the working condition that the battery module is at low power, the temperature of the bus bar is close to that of the battery unit; however, under the working condition that the battery module is at high power, the temperature of the bus bar can rise rapidly due to the restriction of the flow area of the bus bar, the temperature of the battery unit rises slowly, the temperature difference between the temperature of the bus bar and the temperature inside the battery unit is large, the temperature collected by the temperature sensor on the bus bar is not matched with the real temperature inside the battery unit, and the discharging power of the battery module is influenced.
In order to solve the technical problem, as shown in fig. 8, a sampling device 2 provided in an embodiment of the present application includes a temperature collection assembly 21 and a Circuit Board 25, where the temperature collection assembly 21 includes a temperature sensor 211, and the temperature sensor 211 is configured to collect a temperature of the battery unit 1 and transmit a collected temperature signal to the Circuit Board 25, where the Circuit Board may be a FPC (flexible Printed Circuit) or a PCB (Printed Circuit Board); the circuit board 25 includes a mounting portion 252a to which the temperature sensor 211 is fixed, and particularly, the temperature sensor 211 is soldered to the mounting portion 252a so that a temperature signal collected by the temperature sensor 211 can be transmitted to the circuit board 25.
It should be noted that, since the temperature of the top cover 111 is closer to the actual temperature of the battery unit 1, the temperature sensor 211 of the sampling device 2 is used to collect the temperature of the top cover 111.
The Temperature sensor 211 may be an NTC (Negative Temperature Coefficient) thermistor, that is, the resistance of the Temperature sensor 211 decreases exponentially with the increase of Temperature, and the Temperature sensor may be made of a semiconductor ceramic formed of another metal oxide or two or more metal oxides such as manganese, copper, cobalt, iron, nickel, and zinc, and may accurately measure the Temperature.
In one possible design, as shown in fig. 3 and 4, the sampling device 2 further includes a first insulating film 23, the first insulating film 23 is disposed along the height direction Z with the circuit board 25, and along the height direction Z, the first insulating film 23 and the top cover 111 are respectively located at both ends of the circuit board 25, i.e., the temperature sensor 211 is located between the first insulating film 23 and the top cover 111.
As shown in fig. 4 and 5, the first insulating film 23 includes a first main body 231 and a first recessed portion 232, and the first recessed portion 232 is recessed relative to the first main body 231 toward the circuit board 25, that is, the first recessed portion 232 is recessed toward the top cover 111, and the first recessed portion 232 abuts against the mounting portion 252a (fixed to the temperature sensor 211).
Note that "abutment" referred to in the present application includes direct abutment (the first recessed portion 232 is in direct contact with the mounting portion 252 a) and indirect abutment through another member (the first recessed portion 232 is not in direct contact with the mounting portion 252 a).
In this embodiment, taking the viewing angles shown in fig. 1 to 11 as examples, in the battery module, the distribution direction of the top cap assembly 1 and the electrode assembly of the battery unit 1 is the height direction Z, that is, the plate surface of the top cap 111 is perpendicular to the height direction Z, and meanwhile, the top cap 111 is located above the electrode assembly, and the electrode assembly is located below the top cap 111. The sampling devices 2 are distributed with the battery unit 1 in the height direction Z, and specifically, the sampling devices 2 are located above the battery unit 1, that is, above the top cover 111.
Based on this, in the sampling device 2, the first recessed portion 232 of the first insulating film 23 is recessed downward, that is, the first bottom wall 232a of the first recessed portion 232 is recessed downward relative to the first body portion 231 (i.e., close to the top cover 111), the first recessed portion 232 further includes a first side wall 232b, the first side wall 232b extends along the height direction Z and connects the first bottom wall 232a and the first body portion 231, so as to form the first recessed portion 232 located in the first insulating film 23, and the first recessed portion 232 can be formed by hot pressing.
Therefore, in the present embodiment, as shown in fig. 4, when the first recess 232 abuts against the mounting portion 252a of the circuit board 25, the following steps are specifically included: the first bottom wall 232a of the first recessed portion 232 abuts against the mounting portion 252a, and/or the first side wall 232b of the first recessed portion 232 abuts against the mounting portion 252a, and the above embodiments can achieve the purpose of abutting against the mounting portion 252a, and therefore, are all within the scope of the present application.
Therefore, in the embodiment of the present application, by providing the first concave portion 231 that is concave toward the top cover 11 in the first insulating film 23 and making the first concave portion 231 abut against the mounting portion 252a of the temperature sensor 211, a force toward the top cover 111 can be applied to the mounting portion 252a by the first concave portion 231, and abutment (including direct abutment or indirect abutment) of the temperature sensor 211 with the top cover 111 is promoted, that is, the distance between the temperature sensor 211 and the top cover 111 can be reduced, so that the temperature measured by the temperature sensor 211 is closer to the temperature of the top cover 111.
In the battery module of this application embodiment, because temperature sensor 211 realizes the temperature acquisition to battery unit 1 through the temperature of gathering battery unit 1's top cap 111, compare in prior art the temperature of gathering the electricity connection piece, the temperature of top cap 111 is close to the inside true temperature of battery unit 1 more, the difference in temperature of the two also can be in the within range that can accept under abominable operating mode, for example within 5 ℃, the temperature of consequently temperature sensor 211 collection can more accurately react the inside true temperature of battery unit 1, do benefit to the discharge power who guarantees battery module.
Simultaneously, among this sampling device 2 of battery module, the effort can be applyed to temperature sensor 211's installation department 252a to first depressed part 231 of first insulating film 23 to can restrict temperature sensor 211's position, promote to adopt temperature subassembly 21 and top cap 111 laminating, be favorable to guaranteeing top cap 111 and adopt temperature between the subassembly 21 that temperature transfer route is reliable and stable, thereby do benefit to and ensure to adopt temperature subassembly 21 all can accurately to gather the temperature of top cap 111 under all kinds of impact or vibration operating mode.
In addition, when the electrode assembly swells during the operation of the battery unit 1, the swelling force of the electrode assembly acts on the top cap 111 and is transmitted to the sampling device 2, and the swelling force (upward) may cause the sampling device 2 to be damaged or affect the reliability of the electrical connection between the sampling device 2 and the battery unit 1, and in the present embodiment, since the first recess 231 of the first insulating film 23 applies a force (downward) toward the top cap 111 to the mounting portion 252a, the force can resist the swelling force of the battery unit 1, thereby improving the structural strength of the sampling device 2 and the reliability of the electrical connection between the sampling device 2 and the battery unit 1.
The first insulating film 23 may be a plastic film, such as a PET film or a PI film, and the first insulating film 23 may be used to insulate the circuit board 25 and the bus bar 26, and the first insulating film 23 may facilitate formation of the first recess 231 and may provide elasticity to the first recess 231.
In this embodiment, when the battery module is in the vibration operating mode, the elastic first concave part 231 can also buffer the acting force between each component of the sampling device 2, thereby improving the structural strength of the sampling device 2 and improving the reliability of the electrical connection between the sampling device 2 and the battery unit 1.
Specifically, as shown in fig. 7, the circuit board 25 includes a third main body 251 and a third recessed portion 252, and the third recessed portion 252 is recessed with respect to the third main body 251 in the same direction as the first recessed portion 231, and the bottom wall of the third recessed portion 252 is the mounting portion 252a of the temperature sensor 211.
Along the height direction Z, at least a portion of the first recess 232 is located in the third recess 252, that is, the first bottom wall 232a of the first recess 232 is located in the third recess 252, and a portion or all of the first side wall 252b is located in the third recess 252, that is, the third recess 252 is matched with the first recess 231.
In this embodiment, after the first concave portion 231 of the first insulating layer 23 is matched with the third concave portion 253 of the circuit board 25, the rigidity and plasticity of the first concave portion 231 can play a role in shaping the third concave portion 253, so that the concave structure is maintained, thereby facilitating the attachment of the temperature collecting component 21 and the top cover 111.
Meanwhile, as shown in fig. 8, the sampling device 2 further includes a reinforcing portion 22, and the reinforcing portion 22 is fixed to the temperature sensor 211 and is used for supporting and protecting the temperature sensor 211. Specifically, the reinforcing portion 22 is provided with a mounting hole 221, and the temperature sensor 211 is soldered to the circuit board 25 and then mounted to the mounting hole 221, specifically, can be adhered to the mounting hole 221 by the adhesive 222. Wherein, the glue material 222 may be UV glue, and the reinforcement portion 22 may be injection molded piece or epoxy resin structure, so as to be insulated from the temperature sensor 211 while the temperature sensor 211 is mounted.
After the temperature sensor 211 is mounted in the mounting hole 221, at least one end of the temperature sensor 211 protrudes from the surface of the reinforcing portion 22 along the height direction Z, or at least one end of the temperature sensor 211 is flush with the surface of the reinforcing portion 22, so that the temperature sensor 211 is in contact with the circuit board 25 and soldered.
In one possible design, as shown in fig. 5, the first insulating film 23 further includes a convex portion 233, the convex portion 233 being convex in a direction away from the mounting portion 252a, i.e., a convex direction of the convex portion 233 is opposite to a concave direction of the first concave portion 231. At least a portion of the reinforcement 22 is located within the raised portion 233, and the first recessed portion 232 abuts the reinforcement 22.
Likewise, in the present embodiment, the abutment of the first recessed portion 232 with the reinforcement portion 22 includes: either directly (i.e., direct contact between the two) or indirectly (i.e., no direct contact between the two) through another component.
In this embodiment, as shown in fig. 5, the protruding portion 233 includes a top wall 233a and a second side wall 233b, which enclose a receiving cavity, the receiving cavity is matched with the reinforcing portion 22, so that the protruding portion 233 can receive the reinforcing portion 22, and after the reinforcing portion 22 is located in the receiving cavity of the protruding portion 233, a side wall of the reinforcing portion 22 abuts against the second side wall 233b, and a wall surface of the reinforcing portion 22 in the height direction may abut against the top wall 233a, or the wall surface may not abut against the top wall 233a of the protruding portion 233.
Therefore, in this embodiment, the protruding portion 233 can function as a limiting reinforcing portion 22, so as to function as a limiting temperature sensor 211, and can prevent the reinforcing portion 22 and the temperature sensor 211 from shifting when receiving an external force, so as to further ensure that the temperature collection assembly 21 is attached to the top cover 111, and improve the connection reliability between the temperature sensor 211 and the circuit board 25.
Specifically, in the embodiment shown in fig. 5, in the first insulating film 23, the first recessed portion 232 has a first bottom wall 232a, and a portion of the first bottom wall 232a protrudes in a direction away from the reinforcing portion 22, so as to form the protruding portion 233, that is, the protruding portion 233 is formed on the first bottom wall 232a of the first recessed portion 232, and meanwhile, the first recessed portion 232 has a ring-shaped structure, and the first recessed portion 232 surrounds the protruding portion 233.
In this embodiment, the protruding portion 233 is formed in the middle of the first bottom wall 232a, but the protruding portion 233 may also be formed on the edge of the first bottom wall 232 a.
In one possible design, the sampling device 2 further includes a second insulating film 24, the first insulating film 23 and the second insulating film 24 are disposed opposite to each other in the height direction Z, and the circuit board 25 is located between the first insulating film 23 and the second insulating film 24, that is, in the height direction Z, the first insulating film 23 and the second insulating film 24 wrap the circuit board 25, the temperature sensor 211, and the bus bar 26, thereby insulating the components and preventing short circuit caused by mis-touch of the components.
The second insulating film 24 may be a plastic film, such as a PET film or a PI film, and the second insulating film 24 may be used for insulating metal components, such as the circuit board 25 and the bus bar 26.
Specifically, as shown in fig. 6, the second insulating film 24 includes a second main body portion 241 and a second recessed portion 242, wherein the second recessed portion 242 is recessed with respect to the second main body portion 241 in a direction away from the first insulating film 23, that is, the recessed direction of the second recessed portion 242 is the same as the recessed direction of the first and third recessed portions 232 and 252. Meanwhile, at least a part of the third recess 252 is located in the second recess 242 along the height direction Z.
The second recessed portion 242 includes a second bottom wall 243 and a third side wall, wherein the third bottom wall 243 is recessed with respect to the third body portion 241, and the third side wall connects the second bottom wall 243 and the third body portion 241, so as to form the second recessed portion 242. When at least a portion of the third recessed portion 252 is located in the second recessed portion 242, the side wall of the third recessed portion 252 abuts against the side wall of the second recessed portion 242, so that the third recessed portion 252 and the second recessed portion 242 are limited from each other, and the bottom wall of the third recessed portion 252 and the bottom wall of the second recessed portion 242 may abut against each other or may not abut against each other.
In this sampling device 2, along height direction Z, this first depressed part 232, third depressed part 252 and second depressed part 242 arrange from the top down in proper order, and the volume from the top down of three is crescent, thereby make at least part of first depressed part 232 be located third depressed part 252, at least part of third depressed part 252 can be located second depressed part 242, and simultaneously, the shape and the size of above-mentioned three depressed part all adapt, thereby make the three can realize spacing each other, thereby realize first insulating film 23, the connection between circuit board 25 and the second insulating film 24.
Meanwhile, in the present embodiment, the first insulating film 23 and the second insulating film 24 located at the upper and lower ends of the circuit board 25 can maintain the third concave portion 252 of the circuit board 25 in a concave shape, so that the temperature collection assembly 21 is attached to the top cover 111.
Specifically, as shown in fig. 6, the second bottom wall 243 of the second concave portion 242 is opened with a through hole 243a, and the through hole 243a penetrates through the second bottom wall 243 along the height direction Z. Meanwhile, as shown in fig. 4, the temperature sensing assembly 21 further includes a thermal conduction portion 212, and the thermal conduction portion 212 is located at an end of the second insulating film 24 away from the circuit board 25 in the height direction Z, that is, the thermal conduction portion 212 is located below the second insulating film 24, and the thermal conduction portion 212 abuts against the mounting portion 252a of the circuit board 25 through the through hole 243 a.
Similarly, in the present embodiment, the contact of the heat conduction portion 212 with the mounting portion 252a includes: the two are in direct contact (i.e., they are in direct contact) or indirectly contact (i.e., they are not in direct contact) with each other via another member, which is a heat conductive member in this case, so that the heat of the heat conductive portion 212 can be transmitted to the mounting portion 252 a.
After the sampling device 2 is connected to the battery unit 1, the heat conduction portion 212 abuts against the top cover 111 of the battery unit 1, and transmits a temperature signal of the top cover 111 to the circuit board 25.
The heat conduction portion 212 is located directly below the temperature sensor 211, so that the distance between the heat conduction portion 212 and the temperature sensor 211 is small, and the heat conduction path is short.
In the battery module of this embodiment, the path of sampling device 2 to the temperature acquisition of battery unit 1 is: the top cover 111, the heat conducting part 212, the temperature sensor 211 and the circuit board 25, the sampling device 2 in the embodiment can not only collect the temperature of the top cover 111 close to the real temperature of the battery unit 1, but also has the advantages of high temperature collecting accuracy and high response speed.
As shown in fig. 11, the sampling device 2 further includes a bus bar 26, and the bus bar 26 is located between the first insulating film 23 and the second insulating film 24. Wherein the bus bar 26 is used to connect the electrode terminals 112 of the adjacent battery cells 1, the bus bar 26 is welded to the electrode terminals 112, and the bus bar 26 is also welded to the circuit board 25.
In another possible design, as shown in fig. 12, the bus bar 26 is located between the circuit board 25 and the second insulating film 24, specifically between the third recessed portion 252 and the second recessed portion 242, in the height direction Z, and the bus bar 26 abuts against the mounting portion 252a (the bottom wall of the third recessed portion 252).
Likewise, in the present embodiment, the bus bar 26 abutting against the mounting portion 252a includes: either directly (i.e., direct contact between the two) or indirectly (i.e., no direct contact between the two) through another component.
In this embodiment, after the bus bar 26 abuts against the mounting portion 252a, it can support the mounting portion 252a, thereby supporting the temperature sensor 211, and further improving the structural strength of the sample 2 and the accuracy of the sample.
In the embodiment shown in fig. 2, the sampling device 2 includes one recessed structure, and of course, the sampling device 2 may further include a plurality of recessed structures, which may be determined according to the sizes of the battery module and the sampling device 2, as long as the temperature collection assembly 21 can be attached to the top cover 111, and therefore, the arrangement positions and the arrangement number of the recessed structures are not limited in this application.
In addition, as shown in fig. 2, the sampling device 2 further includes a connector 27, and the connector 27 is electrically connected to the circuit board 25 and is used for connecting with external electric equipment or external control equipment. Meanwhile, in the battery module, after the battery units 1 are electrically connected, the battery module is provided with an output electrode 12, the output electrode 12 is used for outputting electric energy, and the output electrode 12 is electrically connected with the sampling device 2.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A sampling device of battery module characterized in that, sampling device includes:
a temperature collection assembly comprising a temperature sensor;
a circuit board including a mounting portion to which the temperature sensor is fixed;
a first insulating film arranged with the circuit board in a height direction (Z);
wherein the first insulating film includes a first recessed portion recessed toward the mounting portion, and the first recessed portion abuts against the mounting portion.
2. The sampling device of the battery module according to claim 1, wherein the circuit board comprises a third body portion, the mounting portion is recessed relative to the third body portion to form a third recessed portion, and the recessed direction of the third recessed portion is the same as the recessed direction of the first recessed portion;
at least part of the first recess is located within the third recess in a height direction (Z).
3. The sampling device of the battery module according to claim 2, wherein the temperature collection assembly further comprises a reinforcement portion, and the temperature sensor is fixed to the reinforcement portion.
4. The sampling device of a battery module according to claim 3, wherein the first insulating film further includes a protruding portion that protrudes in a direction away from the mounting portion;
at least part of the reinforcement portion is located within the raised portion, and the first recessed portion abuts against the reinforcement portion.
5. The sampling device of the battery module according to claim 4, wherein the first recess has a first bottom wall, a portion of which protrudes in a direction away from the mounting portion to form the protruding portion;
the first concave part surrounds the convex part, so that the first bottom wall is of an annular structure.
6. The sampling device of a battery module according to any one of claims 2 to 5, further comprising a second insulating film, wherein the first insulating film and the second insulating film are disposed opposite to each other in a height direction (Z) and are fixedly connected;
the circuit board is located between the first insulating film and the second insulating film;
the first insulating film and the second insulating film are plastic films.
7. The sampling device of a battery module according to claim 6, wherein the second insulating film includes a second recess;
the second recess is in the same direction as the first recess, and at least part of the third recess is located in the second recess.
8. The sampling device of the battery module according to claim 7, wherein the second recess has a second bottom wall, and the second bottom wall is provided with a through hole;
the temperature collection assembly further comprises a heat conduction part, and the heat conduction part is positioned at one end, far away from the circuit board, of the second insulating film along the height direction (Z);
the heat conducting part is abutted to the mounting part through the through hole.
9. The sampling device of a battery module according to claim 6, further comprising a bus bar located between the circuit board and the second insulating film in a height direction (Z);
the bus bar abuts against the mounting portion.
10. The utility model provides a battery module which characterized in that, battery module includes:
a battery cell having a top cover;
a sampling device of the battery module according to any one of claims 1 to 9;
wherein, temperature sensor is used for gathering the temperature of top cap.
CN201921116211.6U 2019-07-16 2019-07-16 Sampling device of battery module and battery module Active CN209822826U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111430827A (en) * 2020-03-19 2020-07-17 安捷利(番禺)电子实业有限公司 Battery core temperature acquisition device, busbar and battery core
CN112054144A (en) * 2020-09-23 2020-12-08 上海兰钧新能源科技有限公司 Soft package module and electric vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111430827A (en) * 2020-03-19 2020-07-17 安捷利(番禺)电子实业有限公司 Battery core temperature acquisition device, busbar and battery core
CN112054144A (en) * 2020-09-23 2020-12-08 上海兰钧新能源科技有限公司 Soft package module and electric vehicle

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