CN112510323A - Data acquisition device and lithium ion battery module - Google Patents
Data acquisition device and lithium ion battery module Download PDFInfo
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- CN112510323A CN112510323A CN202011378627.2A CN202011378627A CN112510323A CN 112510323 A CN112510323 A CN 112510323A CN 202011378627 A CN202011378627 A CN 202011378627A CN 112510323 A CN112510323 A CN 112510323A
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 253
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims description 17
- 230000001154 acute effect Effects 0.000 claims description 16
- 239000000178 monomer Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to the field of lithium ion batteries, and discloses a data acquisition device and a lithium ion battery module. The data acquisition device includes: the circuit board is a rigid board, and a signal sampling circuit is arranged on the circuit board; the acquisition conductor comprises a first acquisition conductor, the first acquisition conductor comprises a first conductor section and a second conductor section which are bent mutually, the first conductor section is fixed on the front side of the circuit board and is electrically connected with the input end of the sampling circuit, and the second conductor section extends out of the upper part of the front side of the circuit board; the back of each acquisition conductor is provided with a first spring, one end of each first spring is fixed on the front of the first conductor section connected to the circuit board, the other end of each first spring abuts against the surface of the acquisition conductor opposite to the circuit board, and the conductivity of each first spring is smaller than that of the acquisition conductor. By the technical scheme, the convenience in connection of the data acquisition device and the bus board of the lithium ion battery module is improved. And connection robustness.
Description
Technical Field
The invention relates to the field of lithium ion batteries, and discloses a data acquisition device and a lithium ion battery module.
Background
With the popularization of the global environmental protection concept, the new energy electric vehicle gradually enters the mass market. Because of the characteristics of the lithium ion battery, the cell voltage and the temperature of the battery need to be detected in the use process, the use mode in the market at present is mostly that the flexible wire harnesses are connected, the OT terminals are respectively fixed at the tail ends of all wires of the flexible wire harnesses, and when the signal of the battery pack is acquired, all the OT terminals are respectively fixed and locked and fixed on the bus conductors of the bus bar one by one through bolts.
In another collection scheme in the prior art, nickel sheets are welded on a circuit board such as a flexible board or a PCB and then are respectively welded on a bus conductor of a bus bar of a battery pack.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a data acquisition device and a lithium ion battery module, and the application of the technical scheme is beneficial to improving the convenience of connection between the data acquisition device and a bus board of the lithium ion battery module. And connection robustness.
In a first aspect, an embodiment of the present invention provides a data acquisition apparatus, including:
the circuit board is a rigid board, and a signal sampling circuit is arranged on the circuit board;
the acquisition conductor comprises a first acquisition conductor, the first acquisition conductor comprises a first conductor section and a second conductor section which are bent mutually, the first conductor section is fixed on the front face of the circuit board and is electrically connected with the input end of the sampling circuit, and the second conductor section extends out of the upper part of the front face of the circuit board;
the back of each acquisition conductor is provided with one first spring, one end of each first spring is fixed on the front of the circuit board, the other end of each first spring abuts against the surface, facing the circuit board, of the acquisition conductor, and the conductivity of each first spring is smaller than that of the acquisition conductor.
Optionally, an included angle between the first conductor segment and the second conductor segment of the first collecting conductor is an acute angle.
Optionally, an included angle between extension lines of the first conductor segment and the second conductor segment of the first collecting conductor is an acute angle.
Optionally, the acquisition conductor further comprises: a second collecting conductor is arranged on the first collecting conductor,
the second collecting conductor comprises a connecting section which is attached and fixed to the top surface of the second conductor section of the first collecting conductor, and an extending section which extends out of the first collecting conductor.
Optionally, the top surface of the protruding section of the second acquisition conductor is higher than the top surface of the connecting section of the second acquisition conductor.
Optionally, a bending portion is provided between the protruding section of the second collecting conductor and the connecting section.
Optionally, the bent portion and the extending section and the connecting section at two ends of the bent portion form an obtuse angle respectively.
Optionally, one end of the first spring connected to the back surface of the collecting conductor is specifically fixed against the extending section or the bending section of the second collecting conductor.
10. The data acquisition device of claim 9,
the extending section of the second collecting conductor comprises a first conductor section connected with the bending part and a second conductor section positioned at the tail end, an obtuse angle is formed between the first conductor section and the second conductor section,
when the data acquisition device is used for testing, the second conductor section of the second acquisition conductor is flatly attached to the acquired testing end, the extension line of the first conductor section of the second acquisition conductor forms an acute angle with the acquired testing end, and the first spring is in a compressed state.
11. The data acquisition device of claim 10,
the second collecting conductor is characterized by further comprising a second spring, one end of the second spring abuts against the bent part of the second collecting conductor, the other end of the second spring is fixed on the second collecting conductor, and an acute angle is formed between the second spring and the first conductor section on the extending section of the second collecting conductor or the extension line of the first conductor section.
12. The data acquisition device of claim 11,
the second collecting conductor comprises a second spring, one end of the second spring is abutted to the bent part of the extending section of the second collecting conductor, the other end of the second spring is fixed on the second collecting conductor, and an acute angle is formed between the second spring and the first conductor section or the extension line of the first conductor section on the extending section of the second collecting conductor.
13. The data acquisition device of claim 12,
the other end of the second spring is fixed on a second conductor section of the second collecting conductor, and the second spring and an extension line of the first conductor section of the second collecting conductor form an acute angle and intersect with the second conductor section of the second collecting conductor to form an acute angle.
14. The data acquisition device of claim 11,
the first spring and the second spring are formed by bending the integrated spring, and the bent part between the first spring and the second spring is abutted against the acquisition conductor.
15. The data acquisition device of claim 14,
the first spring and the second spring are formed by bending an integrated sheet spring.
16. The data acquisition device of claim 15,
the first spring and the second spring are made of spring steel respectively.
17. The data acquisition device of claim 1,
the first collecting conductor is sheet-shaped, and a sheet-shaped surface of the first conductor section of the first collecting conductor is attached to the top surface of the circuit board.
18. The data acquisition device of claim 17,
the first collecting conductor is a copper sheet.
19. The data acquisition device of claim 4,
the second collecting conductor is sheet-shaped and is attached to the first collecting conductor face to face.
20. The data acquisition device of claim 19,
the second collecting conductor is a copper sheet.
21. The data acquisition device according to any one of claims 1 to 20,
the plurality of collecting conductors are all arranged on the front surface of the circuit board, each collecting conductor is electrically connected with the signal sampling circuit respectively,
the first springs are respectively arranged on the back of the collecting conductors.
22. The data acquisition device of claim 21,
the signal acquisition circuit includes: and a voltage acquisition circuit.
23. The data collection device of claim 22,
the signal acquisition circuit further comprises: and a temperature acquisition circuit.
21. The data acquisition device of claim 21,
the back surface of the circuit board is an insulating surface.
In a second aspect, an embodiment of the present invention provides a lithium ion battery module, including:
the battery pack comprises a battery pack body, a plurality of battery monomers and a plurality of control circuits, wherein the battery pack body is formed by connecting the battery monomers in series and/or in parallel, a bus bar used for connecting the battery monomers in series and/or in parallel is arranged on one side of the battery pack body, the bus bar comprises a plurality of bus conductors, and each bus conductor is electrically connected with each battery monomer;
the data acquisition device of any one of claims 1 to 21, wherein the extension of each acquisition conductor on the circuit board of the data acquisition device that extends above the front face of the circuit board abuts against each bus conductor on the bus bar, and wherein each first spring on the back face of each acquisition conductor is in compression.
It is from top to bottom, adopt this embodiment technical scheme's group battery structure, from top to bottom, for schemes such as prior art's pencil welding or OT terminal connection, the data acquisition device's of this embodiment integration level is higher, and uses this acquisition device and group battery to be connected and the disconnect more simple and convenient. In addition, the insulating surface on the back surface of the circuit board 1 in this embodiment can also provide rigid protection for the lithium ion battery module in this embodiment. The back surface of the circuit board 1 can be provided as an insulating surface, so that the circuit board 1 can also be used as a battery pack to further provide insulation protection.
In addition, for the technical scheme that the OT terminal (located at the tail end of the sampling wire harness) is locked by the nut, the bolt hole needs to be formed in the bus bar, the risk of influencing the overcurrent capacity of the bus bar exists, the elastic surface provided by the spring is used for contact, the opening of the hole in the bus bar is not needed, and the overcurrent capacity of the bus bar is ensured.
In addition, adopt the technical scheme of nut locking OT terminal, its OT terminal welding, OT terminal lock bolt and welding sampling all need artifical supplementary, and need go on one by one, and adopt this embodiment scheme can only need to cover circuit board 1 and lock on the busbar of battery module and can accomplish the connection of all sampling points, and is swift high-efficient.
In addition, the OT terminal of the sampling line is locked on the sampling node of the bus bar by adopting a nut, or the OT terminal is welded on the sampling node of the bus bar, in the application process, the battery module moves along with the power equipment (such as but not limited to a motor car) where the battery module is located, the OT terminal is connected with a bolt or the OT terminal is welded with the bus bar, and the possibility of losing the sampling signal due to loosening caused by long-time vibration exists.
Drawings
Fig. 1 is a schematic structural diagram of a data acquisition device provided in embodiment 1 of the present invention;
fig. 2 is a schematic view of an assembly cross-sectional structure of a data acquisition device and a lithium ion battery module according to embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a data acquisition device according to embodiment 2 of the present invention;
fig. 4 is a schematic view of an assembly cross-sectional structure of a data acquisition device and a lithium ion battery module according to embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of a data acquisition device provided in embodiment 3 of the present invention;
fig. 6 is a schematic view of an assembly cross-sectional structure of a data acquisition device and a lithium ion battery module according to embodiment 3 of the present invention;
fig. 7 is a schematic structural diagram of a data acquisition device according to embodiment 4 of the present invention;
fig. 8 is a schematic cross-sectional structure diagram of a lithium ion battery module with a data acquisition device according to embodiment 4 of the present invention;
FIG. 9 is an enlarged schematic view of a portion A of FIG. 8;
fig. 10 is a schematic perspective view of an acquisition conductor, a first spring, and a second spring in a data acquisition device according to embodiment 4 of the present invention;
FIG. 11 is a schematic side view of the structure of FIG. 10;
fig. 12 is a schematic cross-sectional view of fig. 10.
Reference numerals:
1: a circuit board; 2: a first spring; 31: a first conductor segment; 32: a second conductor segment; 33: arc bending angles;
4: a bus bar; 5: a bolt; 61: a connecting section;
62: a protruding section; 621: a root section; 622: a middle section; 623: a tip segment;
63: a bending section; 7: a second spring.
Detailed Description
The present invention will now be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions of the present invention are provided to explain the present invention without limiting the invention thereto.
Example 1:
see fig. 1 and 2 for an example.
The embodiment provides a data acquisition device which can be applied to a lithium ion battery module and is used for acquiring parameters of the lithium ion battery module. The data acquisition device mainly comprises: circuit board 1, collection conductor, first spring 2. A signal acquisition circuit is disposed in the circuit board 1, wherein the signal acquisition circuit may include, but is not limited to, a voltage acquisition module, a temperature sampling circuit, or other sampling circuits related to battery pack parameters, and may be implemented by, but is not limited to, the prior art.
The collecting conductor made of a good conductive material is arranged on the front surface of the circuit board 1, the collecting conductor of the present embodiment at least comprises a bent conductor (denoted as a first collecting conductor, which is realized only by the first collecting conductor in the present embodiment as an illustration), and conductor segments located on both sides of the bent portion are denoted as a first conductor segment 31 and a second conductor segment 32, respectively, wherein the first conductor segment 31 is fixed on the front surface of the circuit board 1 to be electrically connected with an input end of a sampling circuit thereon, and the second conductor segment 32 is separated from the circuit board 1 and extends above the first conductor segment 31 and the front surface of the circuit board 1.
At least one spring (denoted as a first spring 2) is respectively arranged on the back surface of each collecting conductor, one end of the first spring 2 is fixed on the first conductor section 31 fixed on the front surface of the circuit board 1, and can be fixed on the circuit board 1 or fixed on the front surface of the circuit board 1 or only fixed on the first conductor section 31 of the first collecting conductor as shown in the figure, and the other end of the first spring 2 is abutted against the surface (denoted as the back surface) of the second conductor section 32 of the first collecting conductor, which is opposite to the circuit board 1.
As an illustration of this embodiment, see fig. 2, can set up a plurality of collection conductors according to the number that needs carried out signal acquisition node on a circuit board 1, make every collection conductor correspond a signal acquisition node, the back that stretches out the conductor section of the positive top of circuit board 1 of every collection conductor all is provided with first spring 2, make can adopt this circuit board 1 to carry out data acquisition to a plurality of signal acquisition nodes of group battery simultaneously, improve signal acquisition's efficiency, in order to know the state of group battery comprehensively, realize group battery charge-discharge real-time detection.
The lithium ion battery module is formed by connecting a plurality of battery cells in series or in parallel or in a combination of series and parallel via a bus bar 4, the bus bar 4 is formed by a plurality of bus conductors, the bus conductors are electrically connected to the electrodes of the battery cells in a predetermined series-parallel connection relationship, and the bus conductors are generally arranged in a regular row on the battery pack, so the combination of the bus conductors is referred to as the bus bar 4.
Referring to fig. 2, the application principle of the data acquisition device of the present embodiment is that the front surface of the circuit board 1 faces the bus bar 4, the circuit board 1 is fixed on the end surface of the battery pack by using, for example, bolts 5 or other fixing components, so that the extension section 62 (specifically, the second conductor section 32 of the first acquisition conductor in the present embodiment) of the acquisition conductor extending out of the front surface of the circuit board 1 abuts against the bus bar conductor of the bus bar 4, the first springs 2 abutting against the back surface of the second conductor sections 32 are in a compressed state, the first springs 2 exert a force on the second conductor sections 32 in a direction of pushing the second conductor sections 32 towards the bus bar conductor, thereby ensuring that the first acquisition conductors are in close contact with the bus bar conductors to sample the electrical signals of the bus bar conductor nodes contacted therewith, the sampling signals are transmitted to the signal acquisition circuit on the circuit board 1 through the first acquisition conductors to realize signal acquisition, so that the battery pack control circuit realizes the charge and discharge control of the battery pack according to the sampled parameters, and/or realizes the state measurement of the battery pack and the like.
It can be seen from above that for schemes such as the pencil welding of prior art or OT terminal connection, the data acquisition device of this embodiment's integrated level is higher, and uses this acquisition device and be connected and the disconnect of group battery more simple and convenient. In addition, the insulating surface on the back surface of the circuit board 1 in this embodiment can also provide rigid protection for the lithium ion battery module in this embodiment. The back surface of the circuit board 1 can be provided as an insulating surface, so that the circuit board 1 can also be used as a battery pack to further provide insulation protection.
In addition, for the technical scheme that the OT terminal (located at the tail end of the sampling wire harness) is locked by the nut, the bolt hole needs to be formed in the bus bar, the risk of influencing the overcurrent capacity of the bus bar exists, the elastic surface provided by the spring is used for contact, the opening of the hole in the bus bar is not needed, and the overcurrent capacity of the bus bar is ensured.
In addition, adopt the technical scheme of nut locking OT terminal, its OT terminal welding, OT terminal lock bolt and welding sampling all need artifical supplementary, and need go on one by one, and adopt this embodiment scheme can only need to cover circuit board 1 and lock on the busbar of battery module and can accomplish the connection of all sampling points, and is swift high-efficient.
In addition, the OT terminal of the sampling line is locked on the sampling node of the bus bar by adopting a nut, or the OT terminal is welded on the sampling node of the bus bar, in the application process, the battery module moves along with the power equipment (such as but not limited to a motor car) where the battery module is located, the OT terminal is connected with a bolt or the OT terminal is welded with the bus bar, and the possibility of losing the sampling signal due to loosening caused by long-time vibration exists.
As an illustration of the present embodiment, in the present embodiment, but not limited to, the bending angle a of the first collecting conductor is preferably greater than 180 degrees, and preferably smaller than 360 degrees, for example, a =300 degrees may be set, so that the second conductor segment 32 is bent to be located right above the first conductor segment 31, and an included angle between the first conductor segment 31 and the second conductor segment 32 is an acute angle; or as shown in the figure, an arc bending angle 33 is formed between the first conductor segment 31 and the second conductor segment 32, extension lines of the first conductor segment 31 and the second conductor segment 32 form an acute angle outside the arc bending angle 33, and two ends of the first spring 2 respectively abut against the first conductor segment 31 and the second conductor segment 32 to form a stable-structure triangular structure or a similar triangular structure, so as to improve the elastic support of the first spring 2 on the second conductor segment 32 of the first collecting conductor and ensure the contact tightness between the second conductor segment 32 and the busbar 4.
Example 2:
see fig. 3 and 4.
The difference from embodiment 1 mainly includes that the acquisition conductor of the data acquisition device of this embodiment further includes: a second acquisition conductor.
The second pick-up conductor comprises a connecting section 61 fixed to the top surface of the second conductor section 32 of the first pick-up conductor, and an extended section 62 extending beyond the first pick-up conductor.
Thus, the second conductor segment 32 of the first collecting conductor can be set to a shorter length than in example 1, and the connecting segment 61 of the second collecting conductor is attached thereto along the extending direction of the second conductor segment 32 of the first collecting conductor, and the attaching overlapping length of both is appropriate to ensure the supporting strength of the second conductor segment 32 to the second collecting conductor, so that the second collecting conductor serves as an extension of the first collecting conductor.
Referring to fig. 4, the application principle of the data acquisition device of this embodiment is the same as that of embodiment 1, and the difference is mainly that the protruding section 62 of the second acquisition conductor is pressed against the bus conductor of the bus bar 4 of the battery pack with a certain pressure, so as to realize the contact and electrical connection between the acquisition conductor and the bus bar of the lithium ion battery module.
It can be seen from above that, adopt this embodiment technical scheme, further fixed connection second acquisition conductor on the second conductor section 32 that the bending of first acquisition conductor stretches out, make the section 62 that stretches out of second acquisition conductor support on the busbar 4 of lithium ion battery module with certain pressure, the second acquisition conductor is in by compression state under the effect of busbar 4 and first spring 2, busbar 4 has outside reaction force to the section 62 that stretches out of second acquisition conductor, reaction force produces the second conductor section 32 of first acquisition conductor and pushes up to the direction of circuit board 1, kink 33 between second conductor section 32 and the first conductor section 31 provides the elasticity buffering for this pressure. By adopting the technical scheme of the embodiment, besides the effect of the embodiment 1, the contact tightness between the collecting conductor and the bus bar 4 is further improved, and the signal collecting effect is improved.
As an illustration of the present embodiment, the present embodiment further bends outward slightly at a position of the extending section 62 of the second collecting conductor close to the first collecting conductor, so that the top surface of the extending section 62 of the second collecting conductor is higher than the top surface of the connecting section 61 of the second collecting conductor on the first collecting conductor, and a bent section 63 is formed at this position. When the other end of the second collecting conductor is abutted to the busbar 4 of the lithium ion battery module under a certain pressure, the bent part 63 of the second collecting conductor, which is positioned outside the first collecting conductor, provides a supporting point for the reaction force of the busbar 4 to the second collecting conductor, and the contact tightness between the extending section 62 of the second collecting conductor and the busbar 4 is improved.
As a schematic illustration of the present embodiment, the extending section 62 of the bent section 63 of the second collecting conductor and the connecting section 61 form a large obtuse angle, and the bent section forms an arc.
Referring to fig. 3 and 4, as an illustration of the present embodiment, the fixed connection end of the first spring 2 on the collecting conductor is further disposed on the back surface of the extended section 62 of the second collecting conductor facing the circuit board 1, preferably but not limited to, disposed on the bent section 63, so that the first spring 2 absorbs the reaction force of the bus bar 4 on the second collecting conductor, and provides an elastic support for the extended section 62 of the second collecting conductor, and an elastic fulcrum supported by the first spring 2 is formed at the bent section 63 of the second collecting conductor, thereby further improving the contact tightness between the extended section 62 of the second collecting conductor and the bus bar 4.
Example 3:
see fig. 5 and 6.
As an illustration of the present embodiment, the present embodiment further divides the extending section 62 of the second collecting conductor into three sections from the extreme end to the direction of the bending section 63, the outer side surfaces of the three sections facing the bus bar of the lithium ion battery module are not on the same plane, the root section 621 is parallel to the circuit board 1 and is flat with the bus bar, when the extending section is mounted, the extending section is flat and is attached to the bus bar, the end sections 623 at the two end parts of the root section 621 and the outer side surfaces of the root section 621 respectively form obtuse angles with the root section 621, when the extending section is mounted on the lithium ion battery module, the outer side surfaces of the root section 621 is located at the extreme end and is attached to the bus bar, the root section 621 and the bus bar 4 of the lithium ion battery module form an acute angle, the circuit board 1 is locked in front of the bus bar 4 of the battery module by the bolt 5, the compression degree of the first spring 2 is controlled by controlling the distance between the, the first spring 2 of fixed connection on the kink 63 of root section 621 side supports root section 621 and tightly supports root section 621 with certain pressure at busbar 4, adopts this embodiment technical scheme, is favorable to further improving the contact compactness of the collection conductor and the busbar of this embodiment, improves the signal acquisition effect, extension collection system's life.
As an illustration of the present embodiment, it is preferable to set the obtuse angle between the extreme end and the root section 621 larger than the obtuse angle between the root section 621 and the end section 623 and the root section 621 are almost flat.
Example 4:
see fig. 7-12.
The present embodiment differs from the present embodiment mainly in that the acquisition device of the present embodiment further includes a second spring 7, one end of the second spring 7 is connected to the connection point of the first spring 2 on the first acquisition conductor, see the illustration, one end of the second spring 7 and the first spring 2 abut against the bending part 63 of the extending section 62 of the second acquisition conductor, and the other end of the second spring 7 is fixed at any position of the extending section 62 of the second acquisition conductor, preferably, but not limited to, being disposed at the extreme end of the extending section 62 of the second acquisition conductor as illustrated schematically.
In addition to the technical effects of embodiment 2, in this embodiment, the second spring 7 is further disposed on the surface of the second collecting conductor facing the circuit board 1, the second spring 7 extends along the direction of the extending section 62 of the second collecting conductor, and the second spring 7 continuously provides an elastic support for the extending section 62 of the second collecting conductor, so as to enhance the elastic force of the second collecting conductor and greatly improve the contact tightness between the second collecting conductor and the lithium ion battery module busbar 4.
As an indication of the present embodiment, the second spring 7 of the present embodiment is in a straight strip shape, the end of the second spring 7 is fixed to the extreme end of the extending section 62 of the second collecting conductor, and the second spring 7 spans the extending section 62 of the second collecting conductor, so that the design is favorable for further improving and enhancing the elastic support of the second spring 2 on the second collecting conductor, and further improving the contact tightness between the second spring and the lithium ion battery module busbar 4.
As an illustration of the present embodiment, referring to the figure, the second spring 7 located above the root section 621 closest to the bending part 63 of the extending section 62 of the second collecting conductor is tightly attached to the root section 621, the second spring 7 has a certain gap with the middle section 621 and forms an acute angle of one with the extension line of the middle section 621, and the end of the second spring 7 is fixed at the end of the end section 623 and intersects with the end section 623 to form an acute angle of two, wherein the acute angle of two is smaller than the acute angle of one. When the data acquisition device of the embodiment is installed on a lithium ion battery module, the circuit board 1 is fastened at the front end of the bus bar 4 of the lithium ion battery module through a bolt, the middle section 621 of the extending section 62 of the second acquisition conductor is tightly attached to the bus bar 4 in a face-to-face manner, so that the first spring 2 and the first spring 7 are both in a compressed state, the first spring 2 abuts against the bent part 63 of the extending section 62 of the second acquisition conductor to provide elastic support for pushing the extending section 62 of the second acquisition conductor to the bus bar direction, the second spring 7 abuts against the extending section 62 of the second acquisition conductor to provide elastic support for extending parts of the extending section of the second acquisition conductor, the elasticity and rigidity of the extending section 62 of the second acquisition conductor are improved, and poor contact caused by use loss is avoided. Moreover, the second spring 7 of the present embodiment spans the middle section 622 of the contact bus bar 4, and provides elastic support for both the front and rear ends of the middle section 622, so as to ensure the elasticity and rigidity thereof to the maximum extent, improve the contact tightness between the middle section 622 and the lithium ion battery module bus bar 4, and improve the sampling effect.
As an illustration of the present embodiment, the first spring 2 and the second spring 7 of the present embodiment are preferably, but not limited to, formed by bending an integrated spring, and the bent portion between the first spring 2 and the second spring 7 is on the bent portion abutting against the second collecting conductor. Adopt this integral structure to be favorable to further improving the spring and support the elasticity of the second acquisition conductor with the busbar 4 contact of lithium ion battery module, improve its elasticity endurance strength, improve life, ensure the contact compactness.
As a schematic of the present embodiment, the first spring 2 and the second spring 7 or the integrated first spring 2 and second spring 7 in the present embodiment and embodiments 1, 2 and 3 are all integrated sheet springs. Such as but not limited to, it may be implemented using a spring steel sheet.
As an illustration, the first collecting conductor and the second collecting conductor of the present embodiment are respectively sheet-shaped, but not limited to sheet-shaped, and the sheet-shaped surface of the first conductor segment 31 of the first collecting conductor is attached to the top surface of the circuit board 1, the sheet-shaped surface of the second conductor segment 32 located on the other side of the bent portion of the first collecting conductor is attached to the sheet-shaped surface of the second collecting conductor, and the sheet-shaped surface of the end of the second collecting conductor is attached to the bus conductor on the bus bar 4.
As an illustration, the first collecting conductor and the second collecting conductor of the present embodiment may be respectively implemented by copper sheets.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (9)
1. A data acquisition device, comprising:
the circuit board is a rigid board, and a signal sampling circuit is arranged on the circuit board;
the acquisition conductor comprises a first acquisition conductor, the first acquisition conductor comprises a first conductor section and a second conductor section which are bent mutually, the first conductor section is fixed on the front face of the circuit board and is electrically connected with the input end of the sampling circuit, and the second conductor section extends out of the upper part of the front face of the circuit board;
the back of each acquisition conductor is provided with one first spring, one end of each first spring is fixed on the front of the circuit board, the other end of each first spring abuts against the surface, facing the circuit board, of the acquisition conductor, and the conductivity of each first spring is smaller than that of the acquisition conductor.
2. The data acquisition device of claim 1,
an included angle between the first conductor section and the second conductor section of the first collecting conductor is an acute angle.
3. The data acquisition device of claim 1,
and an included angle between extension lines of the first conductor segment and the second conductor segment of the first collecting conductor is an acute angle.
4. The data acquisition device of claim 1,
the acquisition conductor further comprises: a second collecting conductor is arranged on the first collecting conductor,
the second collecting conductor comprises a connecting section which is attached and fixed to the top surface of the second conductor section of the first collecting conductor, and an extending section which extends out of the first collecting conductor.
5. The data acquisition device of claim 5,
the top surface of the protruding section of the second collecting conductor is higher than the top surface of the connecting section of the second collecting conductor.
6. The data acquisition device of claim 6,
and a bending part is arranged between the extending section of the second acquisition conductor and the connecting section.
7. The data acquisition device of claim 6,
the bent part and the extending section and the connecting section at the two ends of the bent part form an obtuse angle respectively.
8. The data acquisition device of claim 6,
the end of the first spring connected to the back of the collecting conductor is fixed against the extending section or the bending section of the second collecting conductor.
9. A lithium ion battery module, comprising:
the battery pack comprises a battery pack body, a plurality of battery monomers and a plurality of control circuits, wherein the battery pack body is formed by connecting the battery monomers in series and/or in parallel, a bus bar used for connecting the battery monomers in series and/or in parallel is arranged on one side of the battery pack body, the bus bar comprises a plurality of bus conductors, and each bus conductor is electrically connected with each battery monomer;
the data acquisition device of any one of claims 1 to 8, wherein the extension of each acquisition conductor on the circuit board of the data acquisition device that extends above the front face of the circuit board abuts against each bus conductor on the bus bar, and wherein each first spring on the back face of each acquisition conductor is in compression.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658970 | 2020-07-09 | ||
| CN2020106589706 | 2020-07-09 |
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| CN112510323A true CN112510323A (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011378627.2A Pending CN112510323A (en) | 2020-07-09 | 2020-12-01 | Data acquisition device and lithium ion battery module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065181A1 (en) * | 2021-10-20 | 2023-04-27 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and device for manufacturing battery cell |
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2020
- 2020-12-01 CN CN202011378627.2A patent/CN112510323A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023065181A1 (en) * | 2021-10-20 | 2023-04-27 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, electrical device, and method and device for manufacturing battery cell |
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Application publication date: 20210316 |