WO2014117453A1 - 多功能电池罩及其动力电池包 - Google Patents

多功能电池罩及其动力电池包 Download PDF

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Publication number
WO2014117453A1
WO2014117453A1 PCT/CN2013/075448 CN2013075448W WO2014117453A1 WO 2014117453 A1 WO2014117453 A1 WO 2014117453A1 CN 2013075448 W CN2013075448 W CN 2013075448W WO 2014117453 A1 WO2014117453 A1 WO 2014117453A1
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WO
WIPO (PCT)
Prior art keywords
battery
cover
multifunctional
battery pack
battery cover
Prior art date
Application number
PCT/CN2013/075448
Other languages
English (en)
French (fr)
Inventor
陈建国
徐洋波
孙玉鸿
王维军
Original Assignee
湖北追日电气股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖北追日电气股份有限公司 filed Critical 湖北追日电气股份有限公司
Priority to AU2013376705A priority Critical patent/AU2013376705A1/en
Priority to EP13873568.3A priority patent/EP2953185B1/en
Publication of WO2014117453A1 publication Critical patent/WO2014117453A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • 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
    • 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
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
    • 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
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to the field of electric vehicles and energy storage, and more particularly to a multifunctional battery cover and a power battery pack thereof. Background technique
  • the single battery in the battery pack has two kinds of connection, the primary line and the control line of the battery, and the primary line is the connection bus between the single battery and the battery, and is used for the working capacity required for series-parallel connection between the batteries. It is required to withstand large currents; the control line is a control line for detection and current sharing, which is used to detect the state of charge of the battery and perform charge and discharge control and maintenance.
  • the control detection signal lines connected to the BMS are directly bundled together and are dangerously routed along the battery body, which easily causes signal interference during the control process. It directly affects the effect of battery detection and the accuracy of current sharing control, further affecting battery life. At the same time, due to the voltage at both ends of the battery, maintenance and replacement are inconvenient, and there is even a risk of electric shock.
  • the existing power battery pack has no cover, and usually the control line is crimped with a large wire nose and fixed to the outlet terminal of the battery together with the primary line.
  • This type of size line shares a crimping point, because of the length During the period of DC charge and discharge changes, high and low temperature wet environment changes, movement bumps, etc. often cause the connection is not tight, prone to loose, mildew, dust accumulation, poor contact or even electrolytic damage, it is easy to accelerate the discharge corrosion of the connection terminals, loose Or shedding or even sparking, sometimes even causing a burning explosion of the battery. Summary of the invention
  • the technical problem to be solved by the invention is mainly to overcome the defects that the wiring in the battery pack of the prior art is easy to cause signal interference, loose damage, and affect the detection effect of the battery in the box, and provide a simple and reliable assembly and strong anti-interference ability. Multi-function battery cover and its power battery pack.
  • a multifunctional battery cover comprising: a cover body, a plurality of lead terminals disposed on the cover body, and at least one electrical signal acquisition unit
  • the input ends of each of the electrical signal acquisition units are respectively connected to a single unit battery in a battery pack, and the output ends of each of the electrical signal acquisition units are respectively connected to a lead terminal, and a plurality of lead terminals are connected to a battery management unit.
  • the system is connected to transmit the voltage information of the collected battery pack to the battery management system.
  • the lead terminals in this solution are used to lead all the wires out for external connection, and may be standard parts, which may be plugged or crimped onto the cover.
  • the lead terminal of the multifunctional battery cover connects the electrical signal of each single battery in the collected battery pack with an external battery management system, and can function as a voltage detection, and can effectively control and detect the performance of the single battery. .
  • the connection method of the solution can avoid the influence of the power line and the micro current control line which are locked by the nut surface of the same fixed column at the same time in the prior art, avoiding looseness of the wiring and electrolytic corrosion, and securing the battery The normal use of the package and delay battery life.
  • the isolation of the battery cover also reduces the accumulation of dust on the electrical lead portion of the top of the single battery pack, avoids the immersion of the conductive object, and causes the electrical connection to be abnormal, thereby improving the safety of the battery pack.
  • the electrical signal collecting unit comprises: a wire and a conductive elastic connecting member for flexible connection with the single cell, wherein one end of the conductive elastic connecting member is electrically connected to the wire, and the other end is The single cells are electrically connected.
  • the present invention can realize the electrical signal collection of the single battery by using a conductive and flexible connecting member with conductive and deformable functions, such as a connecting elastic piece or a connecting spring. Control the detection of the working capacity of the battery pack, separate the primary line from the fixed point of the control line, and separate the large and small lines to improve reliability.
  • the conductive elastic connecting member comprises a connecting elastic piece.
  • the conductive elastic connecting member further comprises a connecting spring, and the connecting spring is connected in parallel with the connecting elastic piece.
  • the electrical flexible connection between the connecting elastic piece and the unit cell is further enhanced, and the electrical connection between the auxiliary positioning and the further strengthening of the signal line can be enhanced, and the reliability of the electrical connection is enhanced.
  • the connecting elastic piece and the corresponding connecting spring are crimped to the fixing column of the corresponding single battery according to electrical wiring requirements to form an electrical connection.
  • the multifunctional battery cover of the present invention can be flexibly connected with the single battery in the battery pack, so that even if the battery pack is placed in a high-speed automobile, it is not caused by The battery box is shaken and the wire connection is damaged, so that the connection between the power battery pack and the battery management system is more reliable.
  • the plurality of lead terminals comprise a plurality of electrical signal acquisition ports and a plurality of current sharing signal acquisition ports, each of the electrical signal acquisition units further comprising a fuse, and the two ends of each fuse are respectively connected to each of the current sharing signal acquisition ports.
  • the corresponding electrical signal collecting port so that the output terminal of the multifunctional battery cover transmits the electrical signal of each single battery in the collected battery pack to the corresponding port of the external battery management system to realize voltage detection and charging Current balance control.
  • the inner bottom surface of the cover body is further formed with a wire slot for accommodating and collecting the wire harness to the lead terminal.
  • the wire harness of the battery management system is built in the wire slot of the "cover", which can be protected on the one hand. Wires, to avoid the wires exposed, on the other hand can shield electromagnetic interference, so that the wire harness is not easily interfered; at the same time, the wires inside the cover are all in the wireway, so that the whole appearance is neat, beautiful, and the cover is removed. Easy to install, not easy to make mistakes.
  • the cover body is further provided with a plurality of vent holes.
  • the present invention also provides a power battery pack comprising a battery case and a plurality of unit cells fixed in the battery case, characterized in that the power battery pack further comprises a multi-function battery cover as described above.
  • the multifunctional battery cover is provided with a plurality of fastening bolt holes, and is engaged on the battery case by a plurality of fastening bolts.
  • each adjacent two of the unit cells are connected in series by a battery connector for forming a required working capacity of the battery pack between the batteries.
  • the battery connector is a "T"-shaped battery connecting piece, and the lateral edge of the "T"-shaped battery connecting piece is used for connecting two fixing posts of the single battery, and is fastened by a nut.
  • the vertical edge of the "T"-shaped battery connecting piece is crimped to the conductive elastic connecting member on the multifunctional battery cover for transmitting a signal to the lead terminal of the multifunctional battery cover, A detection signal for the single cell is provided, and/or current sharing control during charging is provided.
  • the conductive elastic connecting member in this embodiment is a connecting spring.
  • the multi-function battery cover is further provided with a battery holder for abutting against the top of the unit cell in the battery pack.
  • the battery holder is integrally formed under the multifunctional battery cover and embedded in the battery cells in the battery case. This ensures that the electrical crimping of the multi-function battery cover and the battery pack is normal, and the stability of the multi-function battery cover is ensured.
  • the lead terminal of the multifunctional battery cover of the present invention transports the electrical signals of each single battery in the collected battery pack to an external battery management system for connection, which can double the electrical detection and current balance during charging and discharging.
  • the function is to effectively control and detect the performance of the single cell, and improve the charging and discharging efficiency and service life of the battery pack.
  • the present invention separates the primary line of the high-current serial connection of the single battery of the power battery pack from the control line crimping point of the small current, and solves the electrical connection and reliability of the battery management system of the battery in the power battery pack and the control charging effect. Application issues that effectively extend battery life and reduce maintenance.
  • FIG. 1 is a cross-sectional view of a multifunctional battery cover of the present invention.
  • Figure 2 is a plan view of Figure 1.
  • FIG. 3 is a cross-sectional view showing the assembled and connected battery cover of the present invention and the battery pack.
  • Figure 4 is a top plan view of the electrical connection of the multi-function battery cover and the battery package of Figure 3.
  • Figure 5 is an electrical connection diagram of the multi-function battery cover and the power battery pack of the present invention.
  • Fig. 6a is a partially enlarged view showing the wire of the portion I in Fig. 3 and the fixing column of a single cell in the first embodiment.
  • Figure 6b is a partial enlarged view of the wire of the portion I of Figure 3 and the fixing column of another single cell in the embodiment 2 including the connecting spring.
  • Fig. 7a is a partially enlarged view showing the wire of the portion I in Fig. 3 and the fixing column of a single cell in the case of the embodiment 1 excluding the connecting spring.
  • Fig. 7b is a partial enlarged view of the wire of the portion I in Fig. 3 and the fixing column of another single cell in the case of the connecting spring of the second embodiment.
  • Figure 8 is a cross-sectional view showing the assembly of the multi-function battery cover and the power battery pack according to Embodiment 4 of the present invention.
  • Figure 9 is a top plan view of the electrical connection of the multi-function battery cover of Figure 8 with the power battery package. detailed description
  • a multifunctional battery cover 100 for realizing the integrated connection between the power battery pack and the battery management system mainly includes: a cover 1 and a plurality of leads disposed on the cover 1 a terminal 3, and at least one electrical signal collecting unit, wherein the input end of each of the electrical signal collecting units is respectively connected to a single unit cell 11 in a power battery pack 17 (shown in FIG. 4), each of which is The output ends of the gas signal collecting unit are respectively connected to a lead terminal 3, and the plurality of lead terminals 3 are connected to a battery management system for transmitting the voltage information of the collected power battery pack 17 (shown in FIG. 4) to the battery management system. .
  • the electrical signal collecting unit comprises: a wire 2 and a conductive elastic connecting member, wherein one end of the conductive elastic connecting member is electrically connected to the wire 2, and the other end is electrically connected to the single cell 11.
  • the conductive elastic connecting member may be a connecting elastic piece 6.
  • the cover body 1 is a multi-layered insulating cover body, and the wires 2 are arranged on the inner layer of the cover body, and the upper layer does not have a wire harness for isolation and insulation.
  • the battery cover can be a whole, can be mass-produced, and the assembly is convenient and fast, and it does not need to consume time to connect the main line and the control line, and the appearance is neat and tidy, and the work efficiency is improved.
  • the cover body 1 of the multifunctional battery cover is provided with a vent hole.
  • the cover body of the embodiment further has a wireway slot 4 for receiving and collecting the wire bundles to the lead terminals, and then connecting to the BMS (ie, the battery management system) through the lead terminals, the wire harness.
  • the BMS ie, the battery management system
  • the wire harness of the battery management system is built in the wire slot of the "cover” to protect the wire harness from being exposed, and to shield electromagnetic interference from being disturbed by the wire harness; and the inside of the cover
  • the wire connection is fixed and not easy to make mistakes.
  • the wire harnesses are all walked in the wire trough, so that the entire appearance is neat and elegant.
  • the unit cell 11 in this embodiment may be a single lithium ion power storage battery.
  • the plurality of lead terminals 3 includes a plurality of electrical signal collecting ports.
  • the electrical signal collecting unit comprises: a wire and a conductive elastic connecting member, such as a connecting elastic piece 6, one end of the conductive elastic connecting member The wire is electrically connected, and the other end can realize a flexible electrical connection with the fixing post 12 of the unit cell 11.
  • the wires are connected to the electrical signal acquisition port for transmitting the collected electrical signals to an external battery management system (BMS) to better detect the voltage of the control battery pack and associated electrical signals.
  • BMS battery management system
  • the present invention also provides a power battery pack based on the above-described multifunctional battery cover.
  • the power battery pack is composed of a multi-function battery cover 100 (shown in FIG. 1), a battery case 10, and a plurality of unit cells 11 fixed in the battery case 10.
  • each adjacent two single cells 11 pass through a battery connector 13,
  • a battery connecting piece of a "one" shape is connected in series to form a charge and discharge circuit for the required battery working capacity between the individual cells 11.
  • the multi-function battery cover 100 is integrally formed with a battery holder 16 (shown in FIG. 3) for being placed in the power battery pack from the upper portion.
  • the top of the unit cell 11 is embedded in a single cell in the battery case 10.
  • the cover body 1 is also provided with fastening bolt holes 8 (shown in Fig. 2), and the cover body 1 is fixed to the battery case 10 of the power battery pack 17 by fastening bolts 15 (shown in Fig. 3).
  • the battery box is used to fix the single battery.
  • the battery is a whole set. It can be a trough with ventilation holes around it, or it can be frame type.
  • the fastening bolts 15 are used to fix the multifunctional battery cover 100 to the battery case 10, and ensure that the electrical crimping of the battery cover and the power battery package is normal, and the connection stability of the multifunctional battery cover is ensured.
  • the shape of the battery cover is adapted to the shape of the battery case 10.
  • the assembly method of the present invention is as follows:
  • the fastening bolt is placed in the fastening bolt hole of the battery cover to ensure the verticality of the fastening bolt
  • the battery cover is fitted on the battery case body, and the conductive elastic connecting member is corresponding to the corresponding single battery lead-out fixing column, and the hole of the battery cover is aligned with the connecting hole on the battery case;
  • the battery cover outlet terminal is electrically connected to the corresponding BMS lead-out terminal.
  • the conductive elastic connecting member in the embodiment further includes: a connecting spring 7 (as shown in FIG. 3, FIG. 6a, FIG. 7b), the connecting spring 7 Connected in parallel with the connecting spring 6 .
  • the connecting spring can be sleeved on the fixing column led out by the single cell, so that the electrical flexible connection between the connecting elastic piece and the battery is further strengthened, and the electrical connection between the auxiliary positioning and the further strengthening of the signal line can also be enhanced, and the connection can be strengthened. The reliability of the electrical connection.
  • connection spring can be soldered to the lead-out point of the wire, so that the connecting elastic piece 6 (or the connecting spring) can be flexibly connected with the fixing post 12 of the unit battery 11 (as shown in FIG. 3), so that the battery case is When it is shaken, it can generate a buffering function, which ensures the effective electrical connection between the single battery and the battery management system.
  • the cover body 1 of the multi-function battery cover 100 is provided with a vent hole 9.
  • the cover 1 in Fig. 1 also has a wireway 4 for accommodating and collecting the wire harness to the lead terminal 3, and then connected to the BMS through the lead terminal 3, and the wire 2 and the wire 2 are insulated from each other.
  • the wire of the battery management system is built in the wire slot of the "cover", which can protect the wire 2 on the one hand, avoiding the wire 2 from being exposed on the outside and the single battery, and on the other hand can shield electromagnetic interference, and the wire 2 is not easily interfered.
  • the inner wire connection of the cover body is fixed, and it is not easy to make mistakes.
  • the wires are all in the line slot, which makes the whole appearance neat and elegant.
  • the unit cell in this embodiment may be a single lithium ion power battery.
  • the plurality of lead terminals 3 include an electrical signal collecting port.
  • the electrical signal collecting unit includes: a wire and a conductive elastic connecting member (such as a connecting elastic piece), and one end of the conductive elastic connecting member is electrically connected to the wire 2 The other end is electrically connected to the fixing post 12 of the unit cell 11.
  • a nut 14 is disposed on the fixed post 12.
  • the wires are connected to the electrical signal acquisition port for transmitting the collected electrical signals to an external battery management system (BMS) to better detect and control the charge and discharge of the battery pack.
  • BMS battery management system
  • the present invention also provides a power battery pack 17 based on the multi-function battery cover in this embodiment.
  • the power battery pack 17 includes a multi-function battery cover 100, a battery case 10, and a plurality of unit cells 11 fixed in the battery case 10.
  • the adjacent two unit cells 11 are connected in series by a battery connecting member 13, such as a "one"-shaped battery connecting piece, for forming a required space between the individual unit cells.
  • a battery connecting member 13 such as a "one"-shaped battery connecting piece
  • the multi-function battery cover 100 is integrally formed with a battery holder 16 for abutting against the top of the unit battery 11 in the battery pack, and is embedded therein. On the single battery in the battery box.
  • the shape of the multi-function battery cover is adapted to the fixed connection position of the battery case.
  • the cover body 1 is also provided with fastening bolt holes 8, and the cover body 1 is fixed to the battery case 10 of the battery pack by fastening bolts 15.
  • the fastening bolts 15 are used to fix the multifunctional battery cover to the battery case 10, and ensure that the electrical crimping of the multifunctional battery cover and the battery pack is normal, and the stability of the multifunctional battery cover is ensured.
  • each of the electrical signal acquisition units in the embodiment is further connected to a fuse, and at the same time, the plurality of outlet terminals on the multi-function battery cover are divided into a plurality of electrical signal collection ports and a plurality of current sharing.
  • the signal collecting port, the two ends of each branch fuse 5 are respectively connected to an electrical signal collecting port 22 and a current sharing signal collecting port 21, so that the lead terminals of the multifunctional battery cover will collect each of the collected battery packs.
  • the electrical signal of the single battery is sent to the corresponding port of the external battery management system, which can play the dual role of voltage balance during voltage detection and charging, thereby effectively controlling and detecting the performance of the single battery and improving the service life of the battery.
  • Fig. 3 includes the multifunctional battery cover of the present embodiment.
  • the wire 2, the connecting elastic piece 6, the connecting spring 7, and the lead terminal are all fixed in the cover body 1.
  • each of the wires 2 is connected to a connecting elastic piece 6, and each of the connecting elastic pieces 6 is connected in parallel with a connecting spring 7.
  • Each of the wires, a connecting elastic piece connected in parallel, and a connecting spring form a branch, that is, an electrical signal collecting unit, one end of the branch is connected by a lead wire and a lead terminal, and the other end is connected by a spring piece and a single battery 11
  • One of the fixing posts 12 is electrically connected, and the fixing post 12 is screwed with a nut 14 for fastening the battery connecting member 13 between the adjacent two unit cells 11.
  • the connecting spring 7 is flexibly positioned with the battery fixing post sleeve, and the lead terminal on the multi-function battery cover is connected to the corresponding port of an external battery management system (not shown).
  • the connecting elastic piece 6 and the corresponding connecting spring 7 are flexibly crimped to the fixing column 12 led out by the corresponding single cell 11 according to electrical requirements (as shown in FIG. 5, FIG. 7a-7b), and the control is formed.
  • the connection of the circuit As shown in FIG. 3 to FIG. 5, the connecting elastic piece 6 and the corresponding connecting spring 7 are flexibly crimped to the fixing column 12 led out by the corresponding single cell 11 according to electrical requirements (as shown in FIG. 5, FIG. 7a-7b), and the control is formed.
  • the connection of the circuit is formed.
  • the connecting spring 7 is sleeved on the fixing post 12 of the unit cell 11, so that the electrical flexible connection between the connecting elastic piece 6 and the unit cell 11 is further strengthened, and at the same time, the auxiliary positioning and the further strengthening signal can also be performed.
  • the electrical connection of the wires enhances the reliability of the electrical connections.
  • the connecting spring can be soldered to the lead-out point of the wire, so that the connecting elastic piece (or the connecting spring) can be flexibly connected with the fixing post 12 of the unit cell 11, so that the battery box can generate a buffering effect when it is shaken. An effective electrical connection between the battery and the battery management system is guaranteed.
  • the cover of the multifunctional battery cover is provided with a vent hole 9.
  • the cover body of the embodiment further has a wire slot 4 for receiving and collecting the wire bundles to the lead terminals, and then connecting to the corresponding ports of the BMS through the lead terminals, the wire harness and the wire harness. They are insulated from each other.
  • the wire harness of the battery management system is built in the wire slot of the "cover" to protect the wire on the one hand, to prevent the wire from being exposed on the outside and the single battery, and to shield electromagnetic interference on the other hand, so that the wire harness is not easily interfered; At the same time, the wire connection inside the cover is fixed and is not easy to make mistakes.
  • the wire harnesses are all walked in the wire trough, so that the entire appearance is neat and elegant.
  • the unit cell in this embodiment may be a single lithium ion power battery.
  • the present invention also provides a power battery pack.
  • the power battery pack 17 includes a multi-function battery cover 100 (shown in FIG. 1), a battery case 10, and a plurality of unit cells 11 fixed in the battery case 10.
  • each adjacent two unit cells 11 are connected in series by a battery connecting member 13, such as a "one"-shaped battery connecting piece, for forming between the individual unit cells.
  • a battery connecting member 13 such as a "one"-shaped battery connecting piece
  • the multi-function battery cover is integrally formed with a battery holder for abutting on the top of the unit battery in the battery pack, and is embedded in the battery box. On the cell inside.
  • the shape of the multifunctional battery cover is adapted to the shape of the battery case.
  • the cover body 1 is also provided with fastening bolt holes, and the cover body 1 is fixed to the battery case 10 of the battery pack by fastening bolts 15.
  • the fastening bolts 15 are used to fix the multifunctional battery cover to the battery case 10, and ensure that the electrical crimping of the multifunctional battery cover and the battery pack is normal, and the stability of the multifunctional battery cover is ensured.
  • Figs. 6a, 6b to 7a, and 7b are views showing a state in which the multi-function battery cover of the present invention is electrically connected to the fixing posts of different shapes of the unit cells in the battery pack.
  • the multifunctional battery cover and the power battery package of the present invention can avoid the prior art power line and micro current signal line that simultaneously lock a large current through the nut surface of the same fixed column through the above-mentioned connection manner, and are fixed in the fixed
  • the flexible connection of the conductive connecting elastic piece and/or the connecting spring on the column is such that the battery pack has a flexible balance between the multifunctional battery cover and the battery even when the battery case is slightly shaken even in a high-speed traveling car, thereby avoiding the balance. Damage and connection of the wires ensure power storage An effective electrical connection between the pool and the battery management system.
  • the invention makes the connection of the charge and discharge control line between the power storage battery and the BMS more reliable, so that the connection mode of the battery management system is solidified, and the probability of error is low, thereby improving the efficiency of system maintenance.
  • the invention simplifies the wiring installation of the wires in the battery pack, and the maintenance is also extremely simple, thereby effectively improving the installation and maintenance efficiency of the power battery pack, and prolonging the service life of the battery pack and the charge management system.
  • the difference between this embodiment and the above embodiments 1, 2, and 3 is that, as shown in FIGS. 8-9, the battery connector 13 between the single cells is changed from the "one" type connecting piece of the first embodiment to "T".
  • the connecting piece of the font type, one side of the T-shaped battery connecting piece is electrically connected to the fixing post 12 of the two adjacent unit cells 11, and the other end is for flexible connection with the conductive elastic connecting piece.
  • the conductive elastic connecting member in the figure of the embodiment is a connecting spring.
  • the multifunctional battery cover in this embodiment includes: a wire harness, a connecting spring or a connecting elastic piece, and a lead terminal.
  • the wire harness, the connecting spring, and the lead terminal are all fixed in the cover 1.
  • each wire is connected to a connecting spring or a connecting elastic piece.
  • a wire is formed between each wire and a connecting spring, that is, an electrical signal collecting unit, one end of which is connected by a wire and a lead terminal, and the other end is connected by a spring or a "T" connecting the elastic piece and the single battery.
  • One end of the font type battery connector 13 is flexibly and electrically connected, and is connected to an external battery management system by a lead terminal on the multi-function battery cover.
  • the lateral edge of the "T" type battery connecting piece is used to connect the two fixing posts of the single battery, and is fastened by a nut to bear the large current of the battery pack, "T" type.
  • the vertical side leads to the connection spring of the multi-function battery cover or the connection spring, and the connection spring connected by the wire transmits a signal to the battery cover terminal for providing the detection signal of the single battery and the necessary current sharing balance.
  • the advantages of the embodiment improve the shape of the battery connector based on the foregoing advantages, thereby changing the connection position between the conductive elastic connecting member of the multifunctional battery cover and the unit battery, and enhancing the effect of the foregoing invention while enhancing the same
  • the assembly method of this embodiment is as follows:
  • the fastening bolt is placed in the fastening bolt hole of the multifunctional battery cover to ensure the verticality of the fastening bolt;
  • the multifunctional battery cover is fitted on the battery case body, and the conductive elastic connecting member corresponds to the battery connecting piece between the corresponding single battery, and the hole of the multifunctional battery cover is aligned with the connecting hole on the battery case;
  • the lead terminal of the multi-function battery cover is electrically connected to the corresponding BMS lead-out terminal.
  • the multi-function battery cover and the power battery pack of the present invention can avoid the conventional power line and micro-current signal line that simultaneously lock a large current through the nut surface of the same fixed post through the above-mentioned connection manner and various embodiments. Separating the flexible connecting connection between the conductive connecting piece and the connecting spring on the fixing post or the battery connecting piece, so that the wiring is firm, electrolytic corrosion is not caused, the damage and connection of the wire are avoided, and the power storage battery and the battery management system are ensured. Effective electrical connection.
  • the invention makes the connection between the power storage battery and the BMS more reliable, makes the battery management system connection mode solidified, convenient, and has a low probability of error, thereby improving the efficiency of system maintenance.
  • the isolation of the battery cover also reduces the accumulation of dust on the electrical lead-out portion of the top of the single battery pack, avoids the immersion of the conductive object, and causes the electrical connection to be abnormal, thereby improving the safety of the battery pack.
  • the invention simplifies the wiring installation of the wires in the battery pack, improves the safety and the maintenance is also extremely simple, thereby effectively improving the installation and maintenance efficiency of the power battery pack, and prolonging the service life of the battery pack and the charge management system.

Abstract

一种多功能电池罩（100）及含其的动力电池包（17）。该多功能电池罩（100）包括：一罩体（1），若干设于该罩体（1）上的引出端子（3），及至少一电气信号采集单元，每一该电气信号采集单元的输入端分别与一电池包内的单个的单体电池（11）相连，每一该电气信号采集单元的输出端分别与一引出端子（3）相连，若干引出端子（3）均与一电池管理系统相连，用于将采集的电池包（17）的电压信息输送给电池管理系统。所述多功能电池罩（100）装配简单可靠，且抗干扰能力强。另外，多功能电池罩（100）的引出端子（3）将采集到的电池包（17）内的每个单体电池（11）的电气信号输送到外部的电池管理系统，可起到电压检测与充电时的电流均衡的双重作用，从而能有效地控制和检测单体电池的性能，提高电池的使用寿命。

Description

多功能电池罩及其动力电池包 技术领域
本发明涉及电动汽车与储能领域， 尤其涉及一种多功能电池罩及其动力 电池包。 背景技术
动力蓄电池作为电能的主要储能体正在快速发展， 可以说解决了电池储 能问题就为日益兴起的太阳能、 风能等新能源发电技术与分布式电源、 电动 汽车提供了快速推广的基础。同时动力蓄电池充电与储能也存在发展中的很 多问题， 如储能效率、 使用寿命， 反复可充电的利用率、 自放电及安全可靠 性， 充放电的稳定性与多个单体均衡性等技术问题， 也包括单体容量小、 重 量重，需要多个单体电池组成电池包进行串联或并联来达到一定的电压电流 容量等技术应用问题，这些问题相互影响直接降低了动力蓄电池包的储能效 率与可靠性， 从而大大提高了运行成本， 妨碍了新能源领域的发展。
目前电池包中的单体电池有两种连线， 电池一次线与控制线， 一次线是 单体电池与电池之间的连接母线，用于电池之间的串并联形成所需要的工作 容量， 需要承受大电流； 控制线是用于检测和均流的控制线， 用于检测单体 蓄电池的电量状态进行充放电控制与保养。
由于电池包与电池管理系统（BMS )连线多、 导线混乱工作量大， 容易 出错， 与 BMS相连的控制检测信号线直接捆扎在一起沿着电池本体上布线 危险， 易造成控制过程中信号干扰， 直接会影响电池检测的效果与均流控制 的精度， 进一步影响电池使用寿命。 同时由于电池两端有电压造成维护、 更 换不方便， 甚至有触电危险。
现有动力电池包没有罩，通常控制线采用大线鼻子压接后与一次线一起 固定在电池的出线端子上。 这种大小线共用一个压接点的混接方式， 由于长 期的直流充放电变化、 高低温湿环境变化、 运动颠簸过程等经常造成连接不 紧、 容易出现松脱、 霉变、 灰尘积累、 接触不良甚至电解损坏， 极易加速连 接端子的放电腐蚀， 松动或脱落甚至出现打火现象， 有时甚至会导致电池的 燃烧爆炸。 发明内容
本发明要解决的技术问题主要是为了克服现有技术的电池包内的布线 易造成信号干扰、 松动损坏、 会影响箱内电池的检测效果等缺陷， 提供一种 装配简单可靠且抗干扰能力强的多功能电池罩及其动力电池包。
本发明是通过下述技术方案来解决上述技术问题： 一种多功能电池罩， 其特点在于， 其包括： 一罩体， 若干设于该罩体上的引出端子， 及至少一电 气信号采集单元， 每一该电气信号采集单元的输入端分别与一电池包内的单 个的单体电池相连， 每一该电气信号采集单元的输出端分别与一引出端子相 连， 若干引出端子均与一电池管理系统相连， 用于将采集的电池包的电压信 息输送给电池管理系统。
本方案中的引出端子用于将所有的导线引出以对外连接， 可以是标准 件， 可以是插接或压接在罩体上。 多功能电池罩的引出端子将采集到的电池 包内的每个单体电池的电气信号与外部的电池管理系统连接，可起到电压检 测的作用， 能有效地控制和检测单体电池的性能。 本方案的连接方式， 可避 免现有技术中的通过同一固定柱的螺帽面同时锁紧大电流的动力线与微电 流的控制线所造成的影响， 避免接线的松动与电解腐蚀， 保障电池包的正常 使用并延迟电池寿命。同时通过电池罩的隔离还使单体电池包顶部的电气引 出部分减少了灰尘的积累， 避免了导电物体的浸入等导致电气连接不正常， 提高了电池包的安全性。
较佳地， 该电气信号采集单元至少包括： 一导线及一用于与该单体电池 柔性连接的导电弹性连接件， 其中， 该导电弹性连接件的一端与该导线电连 接， 另一端与该单体电池电连接。 本方案通过一可导电并具形变功能的导电弹性连接件 具导电性且 具一定的弹性形变的连接件， 比如一连接弹片或连接弹簧）， 能实现单体电 池的电气信号采集， 从而能有效控制检测电池包的工作容量， 将一次线与控 制线的连接点固定面分开， 使大小线压接分离， 提高可靠性。
较佳地， 该导电弹性连接件包括一连接弹片。
较佳地， 该导电弹性连接件还包括一连接弹簧， 该连接弹簧与该连接弹 片并联。 这样， 使连接弹片与单体电池之间的电气柔性连接进一步加强， 同 时也可起辅助定位与进一步加强信号线的电气连接作用， 加强了电连接的可 靠性。
较佳地， 该连接弹片及对应的连接弹簧按电气布线要求与相应的单体电 池的固定柱压接， 形成电气连接。 通过在导电弹性连接件加设一连接弹簧， 能使得本发明的多功能电池罩与电池包内的单体电池实现柔性连接，使得即 使电池包处在高速行驶的汽车内时， 也不会因电池箱发生抖动而致导线连接 的损坏， 从而使得动力电池包与电池管理系统之间的连接更加可靠。
较佳地， 若干引出端子包括若干电气信号采集端口及若干均流信号采集 端口， 各该电气信号采集单元还均包括一保险丝， 每一保险丝的两端分别并 接在每个均流信号采集端口与相应的电气信号采集端口， 使得该多功能电池 罩的引出端子将采集到的电池包内的每个单体电池的电气信号输送至外部 的电池管理系统的相应端口， 以实现电压检测及充电时的电流均衡控制。
较佳地， 该罩体的内底面上还形成有一用于容纳并汇集线束到引出端子 的汇线槽.将电池管理系统的导线束内置在"罩体"的线槽内， 一方面可以保 护导线， 避免导线裸露在外， 另一方面可以屏蔽电磁干扰， 使导线束不易受 到干扰； 同时该罩体内部的导线都走在汇线槽中， 这样使整个外观整洁， 美 观大方， 且罩体拆装方便， 不易出错。
较佳地， 该罩体上还开设有若干通气孔。
本发明还提供一种动力电池包，包括一电池箱及一固定于该电池箱内的 若干单体电池，其特点在于，该动力电池包还包括如上所述的多功能电池罩。 较佳地， 该多功能电池罩上设有若干紧固螺栓孔， 并通过若干紧固螺栓 配合在该电池箱上。
较佳地， 每相邻的两个该单体电池之间通过一电池连接件串接， 用于电 池之间形成所需要的电池包的工作容量。
较佳地， 该电池连接件为一 " T"字形的电池连接片， 该 " T"字形的电 池连接片的横边用于连接单体电池的两个固定柱， 并通过螺帽紧固， 用于承 担电池包的大电流； 该 "T"字形的电池连接片的竖边引出与多功能电池罩 上的导电弹性连接件压接， 用于传递信号到该多功能电池罩的引出端子， 提 供单体电池的检测信号，和 /或起到充电时的均流控制。本实施例中的导电弹 性连接件为连接弹簧。
较佳地， 该多功能电池罩上还设有一用于抵设在电池包内的单体电池顶 部的电池固定架。
较佳地， 该电池固定架一体成型在该多功能电池罩的下方， 并嵌设于该 电池箱内的单体电池上。这样可以保证多功能电池罩与电池包的电气压接正 常， 保证了多功能电池罩的稳定性。
在符合本领域常识的基础上， 上述各优选条件， 可任意组合， 即得本发 明各较佳实施例。
本发明的积极进步效果在于：
1、 本发明多功能电池罩的引出端子将采集到的电池包内的每个单体电 池的电气信号输送到外部的电池管理系统连接，可起到充放电时的电气检测 与电流均衡的双重作用， 从而有效地控制和检测单体电池的性能， 提高电池 包充放电效率与使用寿命。
2、 此外， 本发明将动力蓄电池组单体电池大电流串接的一次线与小电 流的控制线压接点分离，解决了动力蓄电池包中电池与控制充电效果的电池 管理系统的电气连接与可靠应用问题， 有效延长电池寿命并减少维护。
3、 方便了电池包与充电管理系统的接线、 安装与维护， 在电池包接线 部分与杂物隔离， 提高安全性， 便于标准化生产与作业。 附图说明
图 1为本发明的多功能电池罩的剖视图。
图 2为图 1的俯视图。
图 3为本发明的多功能电池罩与电池包的装配连接后的剖视图。
图 4为图 3中多功能电池罩与电池包装配电气连接的俯视图。
图 5为本发明的多功能电池罩与动力电池包的电气连接图。
图 6a为图 3中 I部分的导线与一种单体电池的固定柱处于实施例 1连接 时的局部放大图。
图 6b为图 3中 I部分的导线与另一种单体电池的固定柱处于实施例 2 的包括连接弹簧时的局部放大图。
图 7a为图 3中 I部分的导线与一种单体电池的固定柱处于实施例 1的不 包括连接弹簧时的局部放大图。
图 7b为图 3中 I部分的导线与另一种单体电池的固定柱处于实施例 2 的包括连接弹簧时的局部放大图。
图 8为本发明实施例 4的多功能电池罩与动力电池包的装配剖视图。 图 9为图 8中的多功能电池罩与动力电池包装配的电气连接的俯视图。 具体实施方式
下面通过实施例的方式进一步说明本发明，但并不因此将本发明限制在 所述的实施例范围之中。 下列实施例中未注明具体条件的实验方法， 按照常 规方法和条件， 或按照商品说明书选择。
实施例 1
如 1~图 4所示，一种用于实现动力电池包与电池管理系统的一体化连接 的多功能电池罩 100， 其主要包括： 一罩体 1， 若干设于该罩体 1上的引出 端子 3， 及至少一电气信号采集单元， 每一该电气信号采集单元的输入端分 别与一动力电池包 17 (图 4所示） 内的单个的单体电池 11相连， 每一该电 气信号采集单元的输出端分别与一引出端子 3相连，若干引出端子 3均与一 电池管理系统相连， 用于将采集的动力电池包 17 (图 4所示）的电压信息输 送给电池管理系统。
该电气信号采集单元包括： 一导线 2及一导电弹性连接件， 其中， 该导 电弹性连接件的一端与该导线 2电连接， 另一端与该单体电池 11 电连接。 其中， 该导电弹性连接件可以是一连接弹片 6。
罩体 1为多层绝缘罩体， 导线 2布置在罩体的内层， 上层不走线束具有 隔离与绝缘作用。电池罩可为一个整体，可批量化生产，并且装配方便快捷， 不用消耗时间在连接主线与控制线上， 美观整齐， 提高工作效率。
如图 2所示， 多功能电池罩的罩体 1上开有通风孔。
另， 如图 1所示， 本实施例的罩体内还有汇线槽 4， 用于容纳并汇集导 线束到引出端子， 然后通过引出端子再连接到 BMS (即电池管理系统） 上， 导线束与导线束之间相互绝缘。 将电池管理系统的导线束内置在 "罩体"的 线槽内， 一方面可以保护线束， 避免导线裸露在外， 另一方面可以屏蔽电磁 干扰， 使导线束不易受到干扰； 同时该罩体内部的导线连接方式固定， 且不 易出错。 而且， 导线束都走在汇线槽中， 这样使整个外观整洁， 美观大方。
如图 3所示， 本实施例中的该单体电池 11可以是一单体锂离子动力蓄 电池。 若干引出端子 3包括数个电气信号采集端口， 如图 6a、 图 7b所示， 电气信号采集单元包括： 一导线及一导电弹性连接件， 比如一连接弹片 6， 该导电弹性连接件的一端与该导线电连接， 另一端可实现与单体电池 11 的 固定柱 12的柔性电连接。 而导线与电气信号采集端口相连， 用于将采集到 的电气信号输送至外部的电池管理系统（BMS ) ， 以更好地检测控制电池包 的电压及相关电信号。
基于上述的多功能电池罩， 本发明还提供一种动力电池包。 如图 3~4所 示， 其中的动力电池包由多功能电池罩 100 (如图 1所示）、 电池箱 10及一 固置在该电池箱 10内的若干单体电池 11组成。
如图 4所示， 每相邻的两个单体电池 11之间通过一电池连接件 13， 比 如一 "一"字形的电池连接片串接， 用于在各个单体电池 11 之间形成所需 要的电池工作容量的充放电回路。
而为了防止电池箱内单体电池使用中的平稳性， 多功能电池罩 100上还 一体成型有一个电池固定架 16 (如图 3所示）， 用于从上部抵设在动力电池 包内的单体电池 11的顶部， 并嵌设于该电池箱 10内的单体电池上。
罩体 1上还开有紧固螺栓孔 8 (如图 2所示）， 罩体 1通过紧固螺栓 15 (如图 3所示） 固定在动力电池包 17的电池箱 10上。 电池箱用来固定单体 电池成为一组整体， 可以是四周具有散热口通风的槽式， 也可以是框架式。 紧固螺栓 15用来将多功能电池罩 100固定在电池箱 10上， 并保证电池罩整 体与动力电池包的电气压接正常， 保证了多功能电池罩的连接稳定性。 电池 罩的形状与电池箱 10的形状相适应。
本发明的组装方法如下：
1.将紧固螺栓套在电池罩紧固螺栓孔内， 保证紧固螺栓的垂直度；
2.将电池罩配合在电池包箱体上面， 导电弹性连接件与相应的单体电池 引出固定柱对应， 电池罩的孔对准电池箱体上的连接孔位；
3.紧固固定螺母， 将电池罩与电池箱连接固定； 导电弹性连接件与相应 的单体电池引出固定柱压紧；
4. 电池罩引出接线端子与相应的 BMS引出端子电连接。
实施例 2
如图 1所示， 本实施例与实施例 1的不同在于， 本实施例中的导电弹性 连接件还包括： 一连接弹簧 7 (如图 3、 图 6a、 图 7b所示）， 该连接弹簧 7 与该连接弹片 6并联。 具体地， 可将连接弹簧套设于单体电池引出的固定柱 上， 使连接弹片与电池之间的电气柔性连接进一步加强， 同时也可起辅助定 位与进一步加强信号线的电气连接作用， 加强了电连接的可靠性。 比如， 可 以将连接弹簧锡焊在导线的引出点上， 使连接弹片 6 (或连接弹簧） 与单体 电池 11的固定柱 12 (如图 3所示） 可以进行柔性的连接， 使电池箱在抖动 时， 可产生缓冲作用， 保证了单体电池与电池管理系统的有效电连接。 此外， 如图 2所示， 多功能电池罩 100的罩体 1上开有通风孔 9。
图 1中的罩体 1内还有汇线槽 4， 用于容纳并汇集线束到引出端子 3， 然后通过引出端子 3再连接到 BMS上， 导线 2与导线 2之间相互绝缘。 将 电池管理系统的导线内置在 "罩体" 的线槽内， 一方面可以保护导线 2， 避 免导线 2露在外面和单体电池之上， 另一方面可以屏蔽电磁干扰， 导线 2不 易受到干扰； 同时使该罩体内部导线连接方式固定， 且不易出错。 而导线都 走在线槽中， 这样使整个外观整洁， 美观大方。
本实施例中的该单体电池可以是一单体锂离子动力蓄电池。若干引出端 子 3包括电气信号采集端口， 如图 3所示， 电气信号采集单元包括： 一导线 及一导电弹性连接件 （比如一连接弹片）， 该导电弹性连接件的一端与该导 线 2电连接， 另一端与该单体电池 11的固定柱 12电连接。 固定柱 12上设 有螺帽 14。而导线与电气信号采集端口相连，用于将采集到的电气信号输送 至外部的电池管理系统 （BMS) ， 以更好地检测控制电池包的充放电。
基于本实施例中的多功能电池罩，本发明还提供一种动力电池包 17。如 图 3~4所示， 其中的动力电池包 17包括多功能电池罩 100、 电池箱 10及一 固置在该电池箱 10内的若干单体电池 11。
如图 4所示， 相邻的两个单体电池 11之间通过一电池连接件 13， 比如 一 "一"字形的电池连接片串接， 用于在各个单体电池之间形成所需要的电 池包的工作容量。
而为了防止电池箱内单体电池使用中的平稳性， 多功能电池罩 100上还 一体成型有一个电池固定架 16，用于抵设在电池包内的单体电池 11的顶部， 并嵌设于该电池箱内的单体电池上。该多功能电池罩的形状与该电池箱的固 定连接位相适应。
罩体 1上还开有紧固螺栓孔 8，罩体 1通过紧固螺栓 15固定在电池包的 电池箱 10上。 紧固螺栓 15用来将多功能电池罩固定在电池箱 10上， 并保 证多功能电池罩与电池包的电气压接正常， 保证了多功能电池罩的稳定性。
本实施例中的其它部分与实施例 1相同。 实施例 3
本实施例与实施例 2的不同在于， 本实施例中的每个电气信号采集单元 还接入一保险丝， 同时， 多功能电池罩上的若干引出端子分为若干电气信号 采集端口及若干均流信号采集端口， 每支路保险丝 5的两端分别并接在一电 气信号采集端口 22与一均流信号采集端口 21上，使得多功能电池罩的引出 端子将采集到的电池包内的每个单体电池的电气信号输送到外部的电池管 理系统的相应端口， 可起到电压检测与充电时的电流均衡的双重作用， 从而 有效地控制和检测单体电池的性能， 提高电池的使用寿命。
图 3包括本实施例的多功能电池罩。 如图 3和图 4所示， 导线 2、 连接 弹片 6、 连接弹簧 7、 引出端子均固定在罩体 1内。 如图 5所示， 每一导线 2 与一个连接弹片 6相连， 每一个连接弹片 6与一个连接弹簧 7并联。 每一根 导线、 与并联的一个连接弹片、 一个连接弹簧之间构成一个支路， 即电气信 号采集单元， 该支路的一端由导线与引出端子相连， 另一端由连接弹片与单 体电池 11的一个固定柱 12电连接， 固定柱 12上螺接有一螺帽 14， 螺帽 14 用于紧固相邻的两个单体电池 11之间的电池连接件 13。 连接弹簧 7与电池 固定柱相套柔性定位， 由多功能电池罩上的引出端子与外部的电池管理系统 (图中未示出） 的相应端口连接。
如图 3~5所示，连接弹片 6及对应的连接弹簧 7按电气要求与相应的单 体电池 11引出的固定柱 12柔性压接（如图 5， 图 7a~7b所示）， 形成控制电 路的连接。
如图 3所示， 连接弹簧 7套设于单体电池 11的固定柱 12上， 使连接弹 片 6与单体电池 11之间的电气柔性连接进一步加强， 同时也可起辅助定位 与进一步加强信号线的电气连接作用， 加强了电连接的可靠性。 比如， 可以 将连接弹簧锡焊在导线的引出点上， 使连接弹片 （或连接弹簧）与单体电池 11的固定柱 12可以进行柔性的连接，使电池箱在抖动时，可产生缓冲作用， 保证了电池与电池管理系统的有效电连接。
同样的， 如图 2所示， 多功能电池罩的罩体上开有通风孔 9。 另， 如图 1所示， 本实施例的罩体内还有汇线槽 4， 用于容纳并汇集导 线束到引出端子， 然后通过引出端子再连接到 BMS的相应端口上， 导线束 与导线束之间相互绝缘。将电池管理系统的导线束内置在"罩体"的线槽内， 一方面可以保护导线， 避免导线裸露在外和单体电池之上， 另一方面可以屏 蔽电磁干扰，使导线束不易受到干扰；同时该罩体内部的导线连接方式固定， 且不易出错。 而且， 导线束都走在汇线槽中， 这样使整个外观整洁， 美观大 方。
本实施例中的单体电池可以是一单体锂离子动力蓄电池。
基于本实施例中的多功能电池罩， 本发明还提供一种动力电池包。 如图 3~4所示， 其中的动力电池包 17包括多功能电池罩 100 (如图 1所示）、 电 池箱 10及一固置在该电池箱 10内的若干单体电池 11。
如图 4所示， 每相邻的两个单体电池 11之间通过一电池连接件 13， 比 如一 "一"字形的电池连接片串接， 用于在各个单体电池之间形成所需要的 电池包的工作容量的充放电回路。
而为了防止电池箱内单体电池使用中的平稳性， 多功能电池罩上还一体 成型有一个电池固定架， 用于抵设在电池包内的单体电池顶部， 并嵌设于该 电池箱内的单体电池上。 该多功能电池罩的形状与该电池箱的形状相适应。
罩体 1上还开有紧固螺栓孔， 罩体 1通过紧固螺栓 15固定在电池包的 电池箱 10上。 紧固螺栓 15用来将多功能电池罩固定在电池箱 10上， 并保 证多功能电池罩与电池包的电气压接正常， 保证了多功能电池罩的稳定性。
图 6a、 6b~7a、 7b示出了本发明的多功能电池罩与电池包内单体电池的 不同形状的固定柱电连接时的状态图。
本发明的多功能电池罩与动力电池包通过上述的连接方式， 可避免现有 技术中的通过同一固定柱的螺帽面同时锁紧大电流的动力线与微电流的信 号线， 采用在固定柱上压接导电的连接弹片与 /或连接弹簧的柔性连接方式， 使得电池包即使在高速行驶的汽车内， 电池箱发生轻微抖动时， 多功能电池 罩与蓄电池的缓冲有柔性平衡， 避免了导线的损坏与连接， 确保了动力蓄电 池与电池管理系统的有效电连接。
本发明使得动力蓄电池与 BMS之间的充放电控制线连接更加可靠， 使 得电池管理系统连线方式固化， 出错概率低， 从而提高系统维护的效率。
此外， 本发明简化了电池包内导线的接线安装， 且维护也异常简便， 从 而有效提高了动力电池组的安装与维护效率， 延长了电池包及充电管理系统 的使用寿命。
实施例 4
本实施例与上实施例 1、 2、 3的不同在于， 如图 8~9所示， 单体电池间 的电池连接件 13由实施例 1的 "一"字型连接片改为 "T"字型的连接片， T型电池连接片的一面用于两相邻的单体电池 11的固定柱 12电连接， 另一 端用于与所述导电弹性连接件柔性连接。本实施例图中的导电弹性连接件为 连接弹簧。
如图 8和图 9所示， 本实施例中的多功能电池罩包括： 导线束、 连接弹 簧或连接弹片、 引出端子。导线束、连接弹簧、 引出端子均固定在罩体 1内。 其中， 每一导线与一个连接弹簧或连接弹片相连。 每一根导线与一个连接弹 簧之间构成一个支路， 即电气信号采集单元， 该支路的一端由导线与引出端 子相连， 另一端由连接弹簧或连接弹片与单体电池的一个 "T"字型的电池 连接件 13 的一端柔性电连接， 由多功能电池罩上的引出端子与外部的电池 管理系统连接。
如图 5、 图 9所示， "T"型电池连接片的横边用于连接单体电池的两个 固定柱， 通过螺帽紧固， 用于承担电池包的大电流， "T"型的竖边引出与多 功能电池罩的连接弹簧或连接弹片压接，通过导线相连的连接弹簧传递信号 到电池罩引出端子， 用于提供单体电池的检测信号与必要的均流平衡。
本实施例的优点在前述优点基础之上改善了电池连接件的形状从而改 变了多功能电池罩的导电弹性连接件与单体电池之间的连接位置，在保证前 述发明效果的同时， 增强其连接的可靠性与通用性， 并优化多功能电池罩的 生产工艺， 便于标准化与批量化生产， 提高本发明创造的价值。 本实施例的组装方法如下：
1.将紧固螺栓套在多功能电池罩紧固螺栓孔内， 保证紧固螺栓的垂直 度；
2.将多功能电池罩配合在电池包箱体上面， 导电弹性连接件与相应的单 体电池间的电池连接件对应， 多功能电池罩的孔对准电池箱体上的连接孔 位；
3.紧固固定螺母， 将多功能电池罩与电池箱连接固定， 导电弹性连接件 与相应的单体电池间的电池连接件压紧；
4. 多功能电池罩的引出接线端子与相应的 BMS引出端子电连接。 本发明的多功能电池罩与动力电池包通过上述的连接方式及多种实施 例， 可避免以往的通过同一固定柱的螺帽面同时锁紧大电流的动力线与微电 流的信号线，采用在固定柱或电池连接件上压接导电的连接弹片与连接弹簧 的柔性连接方式进行分离， 使得接线牢固、 不会发生电解腐蚀， 避免了导线 的损坏与连接， 确保了动力蓄电池与电池管理系统的有效电连接。
本发明使得动力蓄电池与 BMS之间的连接更加可靠， 使得电池管理系 统连线方式固化、 方便， 出错概率低， 从而提高系统维护的效率。 同时通过 电池罩的隔离还使单体电池包顶部的电气引出部分减少了灰尘的积累，避免 了导电物体的浸入等导致电气连接不正常， 提高了电池包的安全性。
此外， 本发明简化了电池包内导线的接线安装， 提高了安全性且维护也 异常简便， 从而有效提高了动力电池组的安装与维护效率， 延长了电池包及 充电管理系统的使用寿命。
虽然以上描述了本发明的具体实施方式，但是本领域的技术人员应当理 解， 这些仅是举例说明， 本发明的保护范围是由所附权利要求书限定的。 本 领域的技术人员在不背离本发明的原理和实质的前提下， 可以对这些实施方 式做出多种变更或修改， 但这些变更和修改均落入本发明的保护范围。

Claims

权利要求
1、 一种多功能电池罩， 其特征在于， 其包括： 一罩体， 若干设于该罩 体上的引出端子， 及至少一电气信号采集单元， 每一该电气信号采集单元的 输入端分别与一电池包内的单个的单体电池相连， 每一该电气信号采集单元 的输出端分别与一引出端子相连， 若干引出端子均与一电池管理系统相连， 用于将采集的电池包的电压信息输送给电池管理系统。
2、 如权利要求 1所述的多功能电池罩， 其特征在于， 该电气信号采集 单元至少包括： 一导线及一用于与该单体电池柔性连接的导电弹性连接件， 其中， 该导电弹性连接件的一端与该导线电连接， 另一端与该单体电池电连 接。
3、 如权利要求 2所述的多功能电池罩， 其特征在于， 该导电弹性连接 件包括一连接弹片。
4、 如权利要求 3所述的多功能电池罩， 其特征在于， 该导电弹性连接 件还包括一连接弹簧， 该连接弹簧与连接弹片并联。
5、 如权利要求 4所述的多功能电池罩， 其特征在于， 该连接弹片及对 应的连接弹簧按电气布线要求与相应的单体电池的固定柱压接， 形成电气连 接。
6、 如权利要求 1至 5中任意一项所述的多功能电池罩， 其特征在于， 若干引出端子包括若干电气信号采集端口及若干均流信号采集端口，各该电 气信号采集单元还均包括一保险丝， 每一保险丝的两端分别并接在每个均流 信号采集端口与相应的电气信号采集端口， 使得该多功能电池罩的引出端子 将采集到的电池包内的每个单体电池的电气信号输送至外部的电池管理系 统的相应端口， 以实现电压检测及充电时的电流均衡控制。
7、 如权利要求 6所述的多功能电池罩， 其特征在于， 该罩体的内底面 上还形成有一用于容纳并汇集线束到引出端子的汇线槽。
8、 如权利要求 7所述的多功能电池罩， 其特征在于， 该罩体上还开设 有若干通气孔。
9、 一种动力电池包， 包括一电池箱及一固定于该电池箱内的若干单体 电池， 其特征在于， 该动力电池包还包括如权利要求 1至 8中任意一项所述 的多功能电池罩。
10、 如权利要求 9所述的动力电池包， 其特征在于， 该多功能电池罩上 设有若干紧固螺栓孔， 并通过若干紧固螺栓配合在该电池箱上。
11、 如权利要求 10所述的动力电池包， 其特征在于， 每相邻的两个该 单体电池之间通过一电池连接件串接，用于电池之间形成所需要的电池包的
12、 如权利要求 11所述的动力电池包， 其特征在于， 该电池连接件为 为一 "T"字形的电池连接片， 该 "T"字形的电池连接片的横边用于连接单 体电池的两个固定柱， 并通过螺帽紧固， 用于承担电池包的大电流； 该 " T" 字形的电池连接片的竖边引出与该多功能电池罩上的导电弹性连接件压接， 用于传递信号到该多功能电池罩的引出端子， 提供单体电池的检测信号， 和 /或起到充电时的均流控制。
13、 如权利要求 9~12中任意一项所述的动力电池包， 其特征在于， 该 多功能电池罩上还设有一用于抵设在电池包内的单体电池顶部的电池固定 架。
14、 如权利要求 13所述的动力电池包， 其特征在于， 该电池固定架一 体成型在该多功能电池罩的下方， 并嵌设于该电池箱内的单体电池上。
PCT/CN2013/075448 2013-01-31 2013-05-10 多功能电池罩及其动力电池包 WO2014117453A1 (zh)

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