CN113300054B - Power battery module - Google Patents
Power battery module Download PDFInfo
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- CN113300054B CN113300054B CN202110495425.4A CN202110495425A CN113300054B CN 113300054 B CN113300054 B CN 113300054B CN 202110495425 A CN202110495425 A CN 202110495425A CN 113300054 B CN113300054 B CN 113300054B
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- Prior art keywords
- battery module
- power battery
- mounting bracket
- plate
- connection plate
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
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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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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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
Abstract
The invention provides a power battery module. The power battery module is provided with at least one battery cell and at least one electric connection plate, wherein the electric connection plate is in floating connection with the polar column of the battery cell and is used for connecting different battery cells in series or in parallel. The electric connection plate is close to one end of the battery cell pole and is provided with a first accommodating cavity, and a conductive elastic piece is embedded in the first accommodating cavity. The power battery module further comprises a mounting bracket and a signal acquisition plate, and the electric connection plate is clamped in a first mounting groove on the lower surface of the mounting bracket. The electric connection plate is provided with an extension part, and the signal acquisition plate covers the extension part. The battery connecting plate in the power battery module is in floating connection with the pole of the battery cell, so that the structure of the power battery module is simplified, and the power battery module is convenient to mount and dismount, thereby facilitating the secondary use of the power battery module; meanwhile, the service life of the power battery module is prolonged. The signal acquisition board can reliably carry out signal acquisition.
Description
The application is a divisional application of a Chinese patent application with the application date of 2017, 3 month and 30 days, the application number of 2017102031332 and the invention creation name of 'power battery module'.
Technical Field
The invention relates to the field of battery grouping of electric automobiles, in particular to a power battery module.
Background
For the existing battery grouping technology, when batteries are connected in series and parallel, battery connection is mainly performed through a mode that various battery poles are welded on an electric connecting sheet or fastened by screws. However, when the electric automobile is under various severe working conditions, the battery module generally has structural failure and electrical connection failure after long-term use, thereby affecting the service life and safety of the power battery. In addition, when the existing battery pole is welded with the electric connecting sheet, the power battery cannot be disassembled or the disassembly process is complex, so that the power battery is difficult to use for the second time.
Therefore, the power battery module in the prior art has the defects of lower service life, lower safety and inconvenient secondary use.
Disclosure of Invention
The invention aims to overcome the defects that the power battery module in the prior art has a short service life and is inconvenient for secondary use.
The invention solves the technical problems by the following technical scheme:
the power battery module is provided with at least one battery cell and at least one electric connection plate, and is characterized in that the electric connection plate is in floating connection with a pole of the battery cell and is used for connecting different battery cells in series or in parallel;
one end of the electric connection plate, which is close to the pole of the battery cell, is provided with a first accommodating cavity, and a conductive elastic piece is embedded in the first accommodating cavity;
the power battery module further comprises a mounting bracket, the mounting bracket is pressed on the battery unit, the mounting bracket is provided with an upper surface and a lower surface which are oppositely arranged, a first mounting groove is formed in the lower surface of the mounting bracket, and the electric connection plate is correspondingly clamped in the first mounting groove;
the power battery module further comprises a signal acquisition plate arranged on the mounting bracket, each electric connection plate is provided with an extension part, holes matched with the extension parts are correspondingly formed in the mounting bracket, the extension parts penetrate through the holes and are exposed out of the upper surface of the mounting bracket, and the signal acquisition plate covers the extension parts.
In the technical scheme, the electric connection plate and the battery monomer are in floating connection, and the structure of the electric vehicle can be adaptively adjusted according to the requirements even if the electric vehicle is in a severe use condition, so that the electric connection plate can be reliably and electrically connected to the electrode post of the battery monomer for a long time, and the service life of the power battery module is prolonged; in addition, the power battery module is convenient to install and detach, so that the power battery module can be used for the second time conveniently.
The electric connection plate is electrically connected with the battery cell pole through the conductive elastic piece, so that the power battery module is convenient to mount and dismount, and the power battery module can be used for the second time conveniently; in addition, the structure of the power battery module is simplified by electrically connecting the conductive elastic element with the pole.
The plurality of electric connection plates are electrically connected with the plurality of battery monomers through the mounting bracket, which is equivalent to fixing the plurality of electric connection plates which are mutually independent in structure on the mounting bracket, so that the structure of the power battery module can be simplified, and the reliability of the power battery module can be improved.
The signal acquisition board realizes the electric connection with the conductive elastic element and the battery monomer through the extension part, has simple and reliable structure, and can reliably acquire signals. In addition, the signal acquisition board has the function of acquiring the temperature, the voltage and the battery balance of the battery module.
The floating connection is understood to mean that the electrical connection between the electrical connection plate and the battery cells is not realized by a fixed connection, but by a connection with an adjustable distance between the electrical connection plate and the poles of the battery cells, for example by the expansion and contraction of an elastic element.
Preferably, the protruding portion is provided with a threaded hole, the protruding portion is located between the mounting bracket and the signal acquisition board, and the signal acquisition board is connected to the mounting bracket through a plurality of fasteners and a plurality of threaded holes.
In the technical scheme, the signal acquisition board and the mounting bracket are connected in a simple and reliable manner, and the integral structure of the power battery module is facilitated to be simplified.
Preferably, the power battery module further comprises a cover plate which is covered on the signal acquisition plate.
In this scheme, the apron can play the effect of protection signal acquisition board.
Preferably, the two ends of the signal acquisition board are provided with low-voltage signal acquisition terminals, and the two ends of the cover board are provided with openings for the low-voltage signal acquisition terminals to penetrate.
Preferably, the upper surface of the mounting bracket is also provided with a third mounting groove for embedding the signal acquisition plate and the cover plate, and the third mounting groove is recessed towards the direction of the battery cell;
the outer surfaces of the two side walls of the cover plate are provided with flanges, and the cover plate is clamped in the third mounting groove through the flanges.
In this technical scheme, the signal acquisition board with the apron is located in the third mounting groove, not additionally increase power battery module's height, space utilization is higher.
Preferably, a second mounting groove is formed in the upper surface of the mounting bracket, a pressing element is embedded in the second mounting groove, and the pressing element is pressed on the top of the electric connection plate and is in floating connection with the electric connection plate.
In this technical scheme, the existence of compressing element makes power battery module even be in under comparatively abominable operating mode also can make electrically conductive elastic component carries out the electricity with the battery monomer reliably and is connected, has reduced or avoided the power battery module structure inefficacy or the electrical connection inefficacy that cause because of rocking etc. has improved power battery module's life and security.
Preferably, the first accommodating cavity has a bottom surface and an inner wall surface, the conductive elastic member has a pressing portion and a contact portion, the pressing portion abuts against the bottom surface of the first accommodating cavity, and the contact portion is exposed from the outer surface of the electrical connection plate and abuts against the post surface of the battery cell.
Preferably, a concave part is further arranged between the bottom surface and the inner wall surface of the first accommodating cavity, and the concave part is recessed towards the outer wall surface of the electric connection plate along the radial direction of the electric connection plate.
In the technical scheme, a structure similar to a wedge shape is formed in the first accommodating cavity, so that the conductive elastic piece can be clamped more reliably. The structure of the first accommodating cavity is simpler, that is, the conductive elastic piece can be reliably embedded in the first accommodating cavity through the simpler structure, and the cost is lower. In practice, the first receiving cavity may be configured as a dovetail groove.
Preferably, the conductive elastic member is in interference fit with the first accommodating cavity, and is fixed between the electric connection plate and the pole of the battery cell in an extrusion manner.
Preferably, the second mounting groove is arranged corresponding to the first accommodating cavity, and the central line of the second mounting groove coincides with the central line of the corresponding first accommodating cavity.
Preferably, the pressing element is made of insulating plastic material;
the compressing element is made of nylon.
Preferably, the pressing element has a connecting portion and a pressing portion, the connecting portion is adapted to the second mounting groove, the pressing portion is connected to the bottom surface of the connecting portion along the axial direction of the connecting portion, a second accommodating cavity is formed in the pressing portion, the second accommodating cavity extends to the bottom surface of the connecting portion, an elastic element is arranged in the second accommodating cavity, and the head end of the elastic element is arranged on the bottom surface of the connecting portion, and the tail end of the elastic element is arranged on the top of the electric connecting plate in a pressing mode.
In this technical scheme, the elastic element can be according to actual need to the bottom surface of connecting portion with the relative height between the electric connecting plate carries out elasticity regulation, realizes electric connecting plate with float between the clamp element is connected, thereby makes electrically conductive elastic element can inlay reliably and locate in the first holding intracavity, and can make electrically conductive elastic element can reliably electrically connect in the free utmost point post of battery.
Preferably, the second accommodating cavity is further provided with a limiting part, the limiting part is arranged on the bottom surface of the connecting part and extends along the axial direction of the connecting part, and the central line of the limiting part coincides with the central line of the second mounting groove.
Preferably, the limiting part is made of flame-retardant and insulating elastoplastic material;
the limiting part is made of nylon.
In this technical solution, on the one hand, the limiting portion may limit the elastic element, so as to limit the movement of the elastic element along the axial direction perpendicular to the connecting portion; on the other hand, the limiting part is made of elastic plastic materials, so that the limiting part can directly elastically adjust the relative height between the bottom surface of the connecting part and the electric connecting plate, the structure is simple, and finally the conductive elastic piece can be reliably and electrically connected with the battery single pole even under severe working conditions.
Preferably, the top of the electric connection plate is provided with a protruding part, and the central line of the protruding part is overlapped with the central line of the limiting part and the central line of the second mounting groove;
the two ends of the elastic element are respectively sleeved on the limiting part and the protruding part.
In the technical scheme, on one hand, the limit part and the protruding part are matched to reliably position the elastic element; on the other hand, the elastic element elastically adjusts the relative height between the bottom surface of the connecting part and the electric connection plate through the cooperation of the limiting part and the protruding part, and as the center of the protruding part is positioned on the central line of the first accommodating cavity, the pressing force of the pressing part can be intensively transmitted to the conductive elastic element, and finally the conductive elastic element can be more reliably and electrically connected to the electrode post of the battery cell.
Preferably, a positioning part is arranged on the outer surface of the pressing part along the circumferential direction of the pressing part, and the plane where the positioning part is positioned is parallel to the cross section of the pressing part;
the mounting bracket is provided with a positioning groove which is matched with the positioning part.
In the technical scheme, the cooperation of the positioning part and the positioning groove reliably limits the movement of the pressing element along the axial direction parallel to the connecting part, and the structure is simpler. The positioning part can be arranged as a plurality of sub-positioning parts distributed at intervals, and can also be directly arranged as an annular positioning part.
Preferably, the compressing part, the connecting part and the limiting part are of an integral structure.
Preferably, the pressing part, the connecting part, the limiting part and the positioning part are of an integral structure, and the protruding part and the electric connecting plate are of an integral structure.
In the technical scheme, the pressing part, the connecting part, the limiting part and the positioning part are arranged as an integral structure, and meanwhile, the protruding part and the electric connecting plate are also arranged as an integral structure, so that various connecting modes are omitted, and the installation and the disassembly are simpler; it is important that the impact on the reliability of the compression element due to various connection errors is avoided, so that the reliability of the electrical connection between the conductive elastic element and the pole is finally further improved.
Preferably, the elastic element is a spring.
Preferably, a third accommodating cavity is arranged on the mounting bracket, the top of the third accommodating cavity extends to the lower surface of the mounting bracket, and the third accommodating cavity is communicated with the first mounting groove;
an elastic pressing element is arranged in the third accommodating cavity, is pressed on the top of the electric connecting plate and is in floating connection with the electric connecting plate.
Preferably, the third accommodating cavity is arranged corresponding to the first accommodating cavity, and the central line of the third accommodating cavity coincides with the central line of the corresponding first accommodating cavity.
Preferably, a limiting part is arranged in the third accommodating cavity, the limiting part extends from the bottom of the third accommodating cavity along the axial direction of the third accommodating cavity, and the central line of the limiting part coincides with the central line of the third accommodating cavity;
the top of the electric connecting plate is provided with a protruding part, and the central line of the protruding part coincides with the central line of the limiting part;
the two ends of the elastic pressing element are respectively sleeved on the limiting part and the protruding part.
In the technical scheme, on one hand, the limit part and the protruding part are matched to reliably position the elastic pressing element; on the other hand, the elastic pressing element elastically adjusts the relative height between the bottom surface of the third accommodating cavity and the electric connection plate through the cooperation of the limiting part and the protruding part, so that the conductive elastic piece can be reliably and electrically connected with the pole of the battery cell.
Preferably, the limiting part and the third accommodating cavity are of an integral structure, and the protruding part and the electric connection plate are of an integral structure.
In this technical scheme, be equivalent to spacing portion with the installing support is a monolithic structure, utilizes the installing support self structure's basis realizes electrically conductive elastic component reliably with float between the battery monomer is connected, and the structure is simpler, and the reliability is also higher.
Preferably, the elastic pressing element is a spring.
Preferably, high voltage output parts are arranged at two ends of the mounting bracket, and the high voltage output parts are used for mounting high voltage plug terminals.
Preferably, the conductive elastic member is a conductive spring.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
the power battery module battery connecting plate is in floating connection with the pole of the battery cell, so that the structure of the power battery module is simplified, and the power battery module is convenient to mount and dismount, thereby facilitating the secondary use of the power battery module; meanwhile, the service life of the power battery module is prolonged;
the electric connection plate is electrically connected with the battery cell pole through the conductive elastic piece, so that the power battery module is convenient to mount and dismount, and the power battery module can be used for the second time conveniently; in addition, the structure of the power battery module is simplified by electrically connecting the conductive elastic element with the pole;
the plurality of electric connection plates are electrically connected with the plurality of battery cells through the mounting bracket, which is equivalent to fixing the plurality of electric connection plates which are mutually independent in structure on the mounting bracket, so that the structure of the power battery module can be simplified, and the reliability of the power battery module can be improved;
the signal acquisition board realizes the electric connection with the conductive elastic element and the battery monomer through the extension part, has simple and reliable structure, and can reliably acquire signals. In addition, the signal acquisition board has the function of acquiring the temperature, the voltage and the battery balance of the battery module.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a power battery module according to embodiment 1 of the present invention.
Fig. 2 is an exploded view of a power battery module according to embodiment 1 of the present invention.
Fig. 3 is a schematic view showing a part of the internal structure of a power battery module according to embodiment 1 of the present invention.
Fig. 4 is a schematic front view of the electrical connection plate in the power battery module according to embodiment 1 of the present invention.
Fig. 5 is a schematic view showing the reverse structure of the electrical connection plate in the power battery module according to embodiment 1 of the present invention.
Fig. 6 is a schematic structural diagram of an electrical connection plate and a mounting bracket in the power battery module according to embodiment 1 of the present invention.
Fig. 7 is a schematic structural view of a mounting bracket in a power battery module according to embodiment 1 of the present invention.
Fig. 8 is a schematic structural view of a pressing member in a power battery module according to embodiment 1 of the present invention.
Fig. 9 is a schematic view showing the internal structure of the pressing member in the power battery module of embodiment 1 of the present invention.
Fig. 10 is a schematic view showing a part of the internal structure of a power battery module according to embodiment 2 of the present invention.
Reference numerals illustrate:
10: cover plate
101: flange
102: groove
20: signal acquisition board
30: mounting bracket
301: first mounting groove
302: second mounting groove
303: positioning groove
304: third mounting groove
305: high voltage output unit
306: third accommodating cavity
307: elastic pressing element
308: second limit part
40: electric connection board
401: first accommodating cavity
402: bottom surface
403: inner wall surface
404: projection part
405: extension part
50: battery cell
60: conductive elastic piece
70: bottom plate
80: compression element
801: connecting part
802: pressing part
803: second accommodating cavity
804: elastic element
805: first limit part
806: positioning part
Detailed Description
The invention will now be more clearly and fully described by way of the following examples in conjunction with the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the power battery module has a cover plate 10, a signal collecting plate 20, a mounting bracket 30, a plurality of electric connection plates 40, a plurality of battery cells 50, a conductive elastic member 60, and a bottom plate 70. Wherein, the plurality of battery cells 50 are correspondingly clamped in the plurality of limit grooves on the bottom plate 70 one by one, the mounting bracket 30 and the bottom plate 70 are oppositely arranged, the mounting bracket 30 is connected with the bottom plate 70 through a plurality of screws, and the mounting bracket 30 is pressed on the plurality of battery cells 50; the cover plate 10 is arranged on the signal acquisition plate 20 in a covering way; the electrical connection plates 40 are floatingly connected to the poles of the plurality of battery cells 50.
The electric connection plate 40 is in floating connection with the battery monomer 50, and the structure of the electric automobile can be adaptively adjusted according to the requirements even if the electric automobile is in a severe use condition, so that the electric connection plate 40 can be reliably and electrically connected with the pole of the battery monomer 50 for a long time, and the service life of the power battery module is prolonged; in addition, the power battery module is convenient to install and detach, so that the power battery module can be used for the second time conveniently.
In this embodiment, as shown in fig. 3 and 4, one end of each electrical connection plate 40, which is close to the post of the battery cell 50, is provided with a first accommodating cavity 401, the first accommodating cavity 401 is embedded with a conductive elastic member 60, and the conductive elastic member 60 is in interference fit with the first accommodating cavity 401. The first accommodating cavity 401 has a bottom surface 402 and an inner wall surface 403, and the conductive elastic member 60 has a pressing portion (not shown) and a contact portion (not shown), wherein the pressing portion abuts against the bottom surface 402 of the first accommodating cavity 401, and the contact portion is exposed on the outer surface of the electrical connection plate 40 and abuts against the post surface of the battery cell 50. In addition, in the present embodiment, a recess (not shown) is further provided between the bottom surface 402 and the inner wall surface 403 of the first accommodation chamber 401, and the recess is recessed in the radial direction of the electrical connection plate 40 toward the outer wall surface of the electrical connection plate 40.
In other alternative embodiments, the first accommodating cavity 401 may be selectively provided on only one of the electrical connection plates 40 or on other number of the electrical connection plates 40 for the plurality of electrical connection plates 40, not limited to the arrangement in the present embodiment.
In this embodiment, a structure similar to a wedge is formed in the first accommodating cavity 401, so that the conductive elastic member 60 can be reliably clamped, and the structure is simpler and the cost is lower. In fact, in the present embodiment, the first accommodating chamber 401 is configured as a dovetail groove. In other embodiments, the first accommodating cavity 401 may be configured in other structures according to actual needs, as long as the conductive elastic member 60 can be reliably electrically connected with the post of the battery cell 50. In addition, in this embodiment, the conductive elastic member 60 may be a conductive spring, and in order to achieve a floating connection between the electrical connection plate 40 and the post of the battery cell 50, the depth of the first receiving cavity 401 is 60% to 80% of the height of the conductive spring.
In the present embodiment, as shown in fig. 2, 6 and 7, the mounting bracket 30 has an upper surface and a lower surface that are disposed opposite to each other, and a plurality of first mounting grooves 301 are provided on the lower surface of the mounting bracket 30. Wherein, the plurality of electric connection plates 40 are correspondingly clamped in the plurality of first mounting grooves 301 one by one; the upper surface of the mounting bracket 30 is provided with a plurality of second mounting grooves 302, the plurality of second mounting grooves 302 are arranged in one-to-one correspondence with the plurality of first accommodating cavities 401, the center line of each second mounting groove 302 coincides with the center line of the corresponding first accommodating cavity 401, each second mounting groove 302 is embedded with a pressing element 80, and the pressing element 80 is pressed on the top of the electric connection plate 40 and is in floating connection with the electric connection plate 40. In addition, the pressing element 80 is made of an insulating plastic material, and in this embodiment, the pressing element 80 is made of nylon.
In this embodiment, the plurality of electric connection plates 40 are mounted on the poles of the battery cells 50 through the mounting bracket 30, which corresponds to fixing the plurality of electric connection plates 40, which are structurally independent of each other, to the mounting bracket 30, so that the structure of the power battery module can be simplified, and the reliability of the power battery module can be improved. The existence of the pressing element 80 can enable the conductive elastic piece 60 to be reliably electrically connected with the battery unit 50 even under a relatively severe working condition, so that structural failure or electrical connection failure of the power battery module caused by shaking and the like is reduced or avoided, and the service life and safety of the power battery module are improved.
As shown in fig. 2, 8 and 9, the pressing member 80 has a connection portion 801 and a pressing portion 802, the connection portion 801 being fitted to the second mounting groove 302, the pressing portion 802 being connected to the bottom surface of the connection portion 801 in the axial direction of the connection portion 801. The pressing portion 802 has a second accommodating cavity 803, the second accommodating cavity 803 extends to the bottom surface of the connecting portion 802, an elastic element 804 is disposed in the second accommodating cavity 803, and a head end of the elastic element 804 is disposed on the bottom surface of the connecting portion 801 and a tail end of the elastic element is disposed on the top of the electric connecting plate 40. In this embodiment, the elastic member 804 is a spring.
The elastic element 804 can elastically adjust the relative height between the bottom surface of the connection portion 801 and the electric connection plate 40 according to actual needs, so as to realize floating connection between the electric connection plate 40 and the pressing element 80, thereby enabling the conductive elastic element 60 to be reliably embedded in the first accommodating cavity 401, and enabling the conductive elastic element 60 to be reliably electrically connected to the post of the battery cell 50.
As shown in fig. 3, 5 and 9, the second accommodating cavity 803 is further provided with a first limiting portion 805, and the first limiting portion 805 is disposed on the bottom surface of the connecting portion 801 and extends along the axial direction of the connecting portion 801; the top of the electric connection plate 40 is provided with a protruding part 404, and the central line of the protruding part 404 coincides with the central line of the first limit part 805 and the central line of the second mounting groove 302; the head end of the elastic element 804 is sleeved on the first limiting portion 805, the tail end of the elastic element is sleeved on the protruding portion 404, and a gap is formed between the end face of the first limiting portion 805 and the end face of the protruding portion 404. In addition, the first limiting portion 805 is made of flame-retardant and insulating elastoplastic material, and in this embodiment, the material of the first limiting portion 805 is nylon.
In this embodiment, on the one hand, the first limiting portion 805 and the protruding portion 404 cooperate to reliably position the elastic element 804; on the other hand, the elastic element 804 elastically adjusts the relative height between the bottom surface of the connection portion 801 and the electrical connection plate 40 through the cooperation of the first limiting portion 805 and the protruding portion 404, and since the center of the protruding portion 404 is located on the center line of the first accommodating cavity 401, the pressing force of the pressing portion 802 can be intensively transferred to the conductive elastic element 60, and finally, the conductive elastic element 60 can be electrically connected to the post of the battery cell 50 more reliably.
In addition, as shown in fig. 3, 8 and 9, a positioning portion 806 is provided on the outer surface of the pressing portion 802 along the circumferential direction of the pressing portion 802, and a plane in which the positioning portion 806 is located is parallel to the cross section of the pressing portion 802; the mounting bracket 30 is provided with a positioning groove 303, and the positioning groove 303 is matched with the positioning part 806. The engagement of the positioning portion 806 with the positioning groove 303 reliably restricts the movement of the pressing member 80 in the axial direction parallel to the connecting portion 801, and the structure is simple.
In the present embodiment, the positioning portion 806 is provided as an annular positioning portion around the circumferential direction of the pressing portion 802. In other embodiments, the positioning portion 806 may also be provided as a plurality of sub-positioning portions distributed at intervals.
In this embodiment, the pressing portion 802, the connecting portion 801, the first limiting portion 805, and the positioning portion 806 are integrally formed, and the protruding portion 404 and the electrical connection board 40 are integrally formed. Therefore, various connection modes are omitted, and the installation and the disassembly are simpler; it is important that the impact on the reliability of the hold-down element 80 due to various connection errors is avoided, thereby eventually further improving the reliability of the electrical connection between the conductive elastic element 60 and the pole.
In other embodiments, the conductive elastic member 60 may be provided in other structures, not limited to the conductive spring; likewise, the elastic element 804 may be provided in other structures, not just a spring.
As shown in fig. 2 and fig. 4 to 6, the middle portion of the mounting bracket 30 is provided with a third mounting groove 304 recessed toward the battery cell 50, and the length direction of the third mounting groove 304 is parallel to the length direction of the power battery module. The electric connection plate 40 has a protruding portion 405, and protruding portions of the mounting bracket 30 located at both sides of the third mounting groove 304 are correspondingly provided with holes (not shown) adapted to the protruding portion 405, the protruding portion 405 passes through the holes and is located on the upper surface of the third mounting groove 304 of the mounting bracket 30, the protruding portion 405 is provided with a threaded hole, and the signal acquisition plate in fig. 2 is mounted in the third mounting groove 304 and covers the protruding portion 405, and is connected to the mounting bracket 30 through a plurality of fasteners and a plurality of the threaded holes.
As shown in fig. 2 and fig. 2, the cover plate 10 is mounted on the signal acquisition plate 20 in the third mounting groove 304, the outer surfaces of the two side walls of the cover plate 10 are provided with flanges 101, and grooves for the flanges 101 to be clamped and fixed are formed at corresponding positions of the third mounting groove 304.
In this embodiment, the signal acquisition board 20 is electrically connected to the battery cell 50 through the protruding portion 405 contacting the electrical connection board 40, so as to obtain the temperature, voltage and battery equalization performance of the battery module, and the structure is simple and reliable, so that the signal acquisition board 20 can reliably perform signal acquisition. The cover plate 10 can play a role in protecting the signal acquisition plate 20, in addition, the cover plate 10 is arranged in the third mounting groove 304, the height of the power battery module is not additionally increased, and the space utilization rate is higher.
In this embodiment, the two ends of the signal acquisition board 20 are provided with low-voltage signal acquisition terminals (not shown) for outputting data acquired by the battery module and inputting control signals, and as shown in fig. 2, the two ends of the cover board 10 are provided with grooves 102 adapted to the low-voltage signal acquisition terminals. As shown in fig. 1, 2 and 6, the mounting bracket 30 is provided at both ends with high voltage output portions 305, and the high voltage output portions 305 are for connection to high voltage plug terminals.
Example 2
The structure of the power battery module in this embodiment is substantially the same as that of the power battery module in embodiment 1, except that: in this embodiment, the pressing member of embodiment 1 is omitted, and the structure of the mounting bracket 30 is appropriately modified.
As shown in fig. 10, a third accommodating cavity 306 is arranged on the mounting bracket 30, the top of the third accommodating cavity 306 extends to the lower surface of the mounting bracket 30, the third accommodating cavity 306 is arranged corresponding to the first accommodating cavity 401, the central line of the third accommodating cavity 306 coincides with the central line of the corresponding first accommodating cavity 401, and the third accommodating cavity 306 is communicated with a first mounting groove for arranging the electric connection plate 40; an elastic pressing element 307 is arranged in the third accommodating cavity 306, and the elastic pressing element 307 is pressed on the top of the electric connection plate 40 and is in floating connection with the electric connection plate 40.
In addition, in the present embodiment, a second limiting portion 308 is disposed in the third accommodating cavity 306, the second limiting portion 308 extends from the bottom of the third accommodating cavity 306 along the axial direction of the third accommodating cavity 306, and the center line of the second limiting portion 308 coincides with the center line of the third accommodating cavity 306; the top of the electric connection plate 40 is provided with a protruding part 404, and the central line of the protruding part 404 coincides with the central line of the second limiting part 308; the two ends of the elastic pressing element 307 are respectively sleeved on the second limiting part 308 and the protruding part 404. In the present embodiment, the elastic pressing member 307 is a spring.
On the one hand, the second limiting part 308 and the protruding part 404 can be matched to reliably position the elastic pressing element 307; on the other hand, the elastic pressing element 307 elastically adjusts the relative height between the bottom surface of the third accommodating cavity 306 and the electric connection plate 40 through the cooperation of the second limiting portion 308 and the protruding portion 404, so that the conductive elastic member 60 can be reliably electrically connected to the post of the battery cell 50.
In this embodiment, the second limiting portion 308 and the third accommodating cavity 306 are in an integral structure, and the protruding portion 404 and the electric connection plate 40 are in an integral structure, which is equivalent to that the second limiting portion 308 and the mounting bracket 30 are in an integral structure, so that the conductive elastic member 60 is reliably connected with the battery cell 50 in a floating manner based on the structure of the mounting bracket 30, and the structure is simpler and the reliability is higher.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (26)
1. A power battery module provided with at least one battery cell and at least one electric connection plate, wherein the electric connection plate is in floating connection with a pole of the battery cell and is used for connecting different battery cells in series or in parallel;
one end of the electric connection plate, which is close to the pole of the battery cell, is provided with a first accommodating cavity, and a conductive elastic piece is embedded in the first accommodating cavity;
the power battery module further comprises a mounting bracket, the mounting bracket is pressed on the battery unit, the mounting bracket is provided with an upper surface and a lower surface which are oppositely arranged, a first mounting groove is formed in the lower surface of the mounting bracket, and the electric connection plate is correspondingly clamped in the first mounting groove;
the power battery module further comprises a signal acquisition plate arranged on the mounting bracket, each electric connection plate is provided with an extension part, holes matched with the extension parts are correspondingly formed in the mounting bracket, the extension parts penetrate through the holes and are exposed out of the upper surface of the mounting bracket, and the signal acquisition plate covers the extension parts.
2. The power battery module of claim 1, wherein the extension has a threaded hole therein, the extension being located between the mounting bracket and the signal acquisition board, the signal acquisition board being connected to the mounting bracket by a plurality of fasteners and a plurality of the threaded holes.
3. The power cell module of claim 2, further comprising a cover plate covering the signal acquisition plate.
4. The power battery module of claim 3, wherein the signal acquisition board is provided with low-voltage signal acquisition terminals at both ends, and the cover board is provided with openings at both ends for the low-voltage signal acquisition terminals to pass through.
5. The power battery module according to claim 3, wherein the upper surface of the mounting bracket is further provided with a third mounting groove for embedding the signal acquisition plate and the cover plate, and the third mounting groove is recessed toward the battery cell;
the outer surfaces of the two side walls of the cover plate are provided with flanges, and the cover plate is clamped in the third mounting groove through the flanges.
6. The power battery module of claim 1, wherein a second mounting groove is formed in the upper surface of the mounting bracket, and a pressing element is embedded in the second mounting groove, pressed on the top of the electric connection plate, and is in floating connection with the electric connection plate.
7. The power battery module according to claim 1, wherein the first accommodating chamber has a bottom surface and an inner wall surface, the conductive elastic member has a pressing portion and a contact portion, the pressing portion abuts against the bottom surface of the first accommodating chamber, and the contact portion is exposed from the outer surface of the electrical connection plate and abuts against the post surface of the battery cell.
8. The power battery module according to claim 7, wherein a recess is further provided between the bottom surface and the inner wall surface of the first accommodation chamber, and the recess is recessed in the radial direction of the electrical connection plate toward the outer wall surface of the electrical connection plate.
9. The power battery module of claim 1, wherein the conductive elastic member is interference fit with the first receiving cavity and is pressed and fixed between the electrical connection plate and the post of the battery cell.
10. The power battery module of claim 6, wherein the second mounting groove is disposed corresponding to the first receiving cavity, and a center line of the second mounting groove coincides with a center line of the corresponding first receiving cavity.
11. The power cell module of claim 10, wherein the compression element is made of an insulating plastic material;
the compressing element is made of nylon.
12. The power battery module of claim 10, wherein the pressing element has a connecting portion and a pressing portion, the connecting portion is adapted to the second mounting groove, the pressing portion is connected to the bottom surface of the connecting portion along the axial direction of the connecting portion, the pressing portion has a second accommodating cavity therein, the second accommodating cavity extends to the bottom surface of the connecting portion, an elastic element is disposed in the second accommodating cavity, and a head end of the elastic element is disposed on the bottom surface of the connecting portion, and a tail end of the elastic element is disposed on the top of the electric connecting plate.
13. The power battery module of claim 12, wherein the second receiving cavity further has a limiting portion, the limiting portion is disposed on a bottom surface of the connecting portion and extends along an axial direction of the connecting portion, and a center line of the limiting portion coincides with a center line of the second mounting groove.
14. The power battery module of claim 13, wherein the limit portion is made of flame-retardant, insulating elastoplastic material;
the limiting part is made of nylon.
15. The power cell module of claim 14 wherein the battery is provided with a battery,
the top of the electric connecting plate is provided with a protruding part, and the central line of the protruding part is overlapped with the central line of the limiting part and the central line of the second mounting groove;
the two ends of the elastic element are respectively sleeved on the limiting part and the protruding part.
16. The power battery module according to claim 15, wherein a positioning portion is provided on an outer surface of the pressing portion in a circumferential direction of the pressing portion, and a plane in which the positioning portion is located is parallel to a cross section of the pressing portion;
the mounting bracket is provided with a positioning groove which is matched with the positioning part.
17. The power battery module of claim 13, wherein the pressing portion, the connecting portion, and the limiting portion are of an integral structure.
18. The power battery module of claim 16, wherein the pressing portion, the connecting portion, the limiting portion, and the positioning portion are integrally formed, and the protruding portion and the electrical connection plate are integrally formed.
19. The power cell module of claim 12, wherein the resilient element is a spring.
20. The power battery module according to claim 1, wherein a third accommodating cavity is formed in the mounting bracket, the top of the third accommodating cavity extends to the lower surface of the mounting bracket, and the third accommodating cavity is communicated with the first mounting groove;
an elastic pressing element is arranged in the third accommodating cavity, is pressed on the top of the electric connecting plate and is in floating connection with the electric connecting plate.
21. The power cell module of claim 20, wherein the third receiving cavity is disposed in correspondence with the first receiving cavity, and a center line of the third receiving cavity coincides with a center line of the corresponding first receiving cavity.
22. The power battery module according to claim 21, wherein a limiting portion is provided in the third accommodating chamber, the limiting portion extends from the bottom of the third accommodating chamber along the axial direction of the third accommodating chamber, and the center line of the limiting portion coincides with the center line of the third accommodating chamber;
the top of the electric connecting plate is provided with a protruding part, and the central line of the protruding part coincides with the central line of the limiting part;
the two ends of the elastic pressing element are respectively sleeved on the limiting part and the protruding part.
23. The power cell module of claim 22, wherein the retainer portion and the third receiving chamber are of unitary construction, and the projection portion and the electrical connection plate are of unitary construction.
24. The power cell module of claim 23, wherein the resilient compression element is a spring.
25. The power battery module according to claim 1, wherein both ends of the mounting bracket are provided with high voltage output parts for mounting high voltage plug terminals.
26. The power cell module of any one of claims 1-25, wherein the conductive elastic member is a conductive spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495425.4A CN113300054B (en) | 2017-03-30 | 2017-03-30 | Power battery module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203133.2A CN108666451B (en) | 2017-03-30 | 2017-03-30 | Power battery module |
| CN202110495425.4A CN113300054B (en) | 2017-03-30 | 2017-03-30 | Power battery module |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710203133.2A Division CN108666451B (en) | 2017-03-30 | 2017-03-30 | Power battery module |
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| CN113300054A CN113300054A (en) | 2021-08-24 |
| CN113300054B true CN113300054B (en) | 2023-04-28 |
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| CN202110495425.4A Active CN113300054B (en) | 2017-03-30 | 2017-03-30 | Power battery module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110534686A (en) * | 2019-08-29 | 2019-12-03 | 恒大新能源科技集团有限公司 | Busbar ruggedized construction, power supply mould group connection structure and battery pack |
| CN115084764A (en) * | 2022-08-01 | 2022-09-20 | 深圳市泽塔电源系统有限公司 | Battery support structure and battery pack thereof |
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| KR102306442B1 (en) * | 2014-08-25 | 2021-09-28 | 삼성에스디아이 주식회사 | Battery module |
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| CN1790836A (en) * | 2004-12-14 | 2006-06-21 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113300054A (en) | 2021-08-24 |
| CN108666451A (en) | 2018-10-16 |
| CN108666451B (en) | 2021-05-25 |
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