CN207353369U - A kind of battery module - Google Patents

A kind of battery module Download PDF

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Publication number
CN207353369U
CN207353369U CN201721311510.6U CN201721311510U CN207353369U CN 207353369 U CN207353369 U CN 207353369U CN 201721311510 U CN201721311510 U CN 201721311510U CN 207353369 U CN207353369 U CN 207353369U
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China
Prior art keywords
flow passage
bus
bar
conductive plate
battery
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CN201721311510.6U
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Chinese (zh)
Inventor
刘少松
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Microvast Power Systems Co Ltd
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Microvast Power Systems Co Ltd
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Priority to CN201721311510.6U priority Critical patent/CN207353369U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model provides a kind of battery module, including:Several stacked batteries, stacked battery include the battery and bus-bar being stacked, and bus-bar includes connecting portion and flow passage, and connecting portion is electrically connected with the lug of battery, and connecting portion is connected with flow passage;Conductive plate, its one end are at least electrically connected with the flow passage of bus-bar, and the other end is at least electrically connected with the flow passage of another bus-bar.The utility model solves the problems, such as that conveyance capacity, energy density and welding effect are difficult to take into account, there is provided a kind of battery module, has taken into account conveyance capacity, energy density and welding effect.

Description

A kind of battery module
Technical field
It the utility model is related to a kind of battery module.
Background technology
Lithium ion battery is that a kind of average output voltage is high, and output power, self discharge is small, memory-less effect, work temperature Degree scope is wide, and cycle performance is superior, and efficiency for charge-discharge is high, service life length, the green battery without poisonous and harmful substance.It is Battery, which is completed, by lithium ion insertion round-trip between positive and negative electrode and deintercalation is charged and discharged work.
Lithium ion single cell parallel is generally first formed stacked battery and then by battery stack by Li-ion batteries piles Body is composed in series battery modules.In the prior art, single battery by lug and bus-bar be electrically connected realize single battery it Between parallel connection;In the stacked battery being stacked by multiple single batteries, each single battery is in parallel by bus-bar Connect, the bus-bar between different stacked batteries, which is welded together to form, to be connected in series.
Since the welding effect between same metal is optimal, thus the positive and negative electrode lug of single battery each with its material Expect that identical bus-bar welds together.Since the material of single battery positive and negative electrode lug is different, cause the material of corresponding bus-bar Material is different, when the bus-bar of different materials directly welds, it is difficult to while take into account conveyance capacity, energy density and welding effect.
Utility model content
The utility model provides a kind of battery module, including:
Several stacked batteries, stacked battery include the battery and bus-bar being stacked, and bus-bar includes connecting portion And flow passage, connecting portion are electrically connected with the lug of battery, the connecting portion is connected with flow passage;
Conductive plate, its one end are at least electrically connected with the flow passage of bus-bar, mistake of the other end at least with another bus-bar Stream portion is electrically connected.
In a kind of embodiment of the utility model, a flow passage is set on the bus-bar, the conductive plate Quantity is 1.
The connecting portion of bus-bar refers to the part being connected on bus-bar with the lug of battery;Flow passage refers to connect on bus-bar Other parts outside socket part, bus-bar mainly transmit electric current by flow passage.The orientation of connecting portion and flow passage is vertical In the stacked direction of battery.By the way that lug is connected to the series/parallel realized on bus-bar between several batteries.By using Conductive plate connection bus-bar realizes the series/parallel between several stacked batteries.
In a kind of embodiment of the utility model, a flow passage is set on the bus-bar, the conductive plate Quantity is at least 2.
In a kind of embodiment of the utility model, the length direction of flow passage is identical with the stacked direction of battery.
In a kind of embodiment of the utility model, connecting portion is provided with lug hole, and the lug of battery passes through lug hole It is electrically connected with connecting portion.
Several lug holes are provided with connecting portion, are advantageously implemented the connection of battery.
Lug hole is arranged on connecting portion position corresponding with battery pole ear;The part in the lug of battery through lug hole passes through Contact, and be fixedly connected by welding with connecting portion after crossing bending.
In a kind of embodiment of the utility model, conductive plate in the middle part of flow passage length direction with contacting.
Conductive plate contacts realization with flow passage and is electrically connected, and is fixedly connected by welding.Conductive plate and flow passage length side To middle part contact so that bus-bar on middle part from electric current to flow passage length direction gather, can reduce on flow passage most High current, is conducive to reduce the thickness of bus-bar, ultimately facilitates the energy density for improving battery module.
In a kind of embodiment of the utility model, conductive plate at least covers the flow passage of bus-bar.
In a kind of embodiment of the utility model, conductive plate and a side contacts of the bus-bar away from battery, and cover Bus-bar.
Conductive plate covering bus-bar can increase the cross-sectional area of conductive plate, improve the conveyance capacity of conductive plate, be conducive to Reduce the thickness of bus-bar and improve the conveyance capacity between two bus-bars.
In a kind of embodiment of the utility model, flow passage includes the first flow passage and the second flow passage, the first mistake Stream portion and the second flow passage are located at the opposite both ends of bus-bar, and connecting portion is between the first flow passage and the second flow passage;Lead Battery plate includes the first overcurrent of the first conductive plate and the second conductive plate, one end of the first conductive plate and the bus-bar of stacked battery Portion is electrically connected, and the other end is electrically connected with the first flow passage of the bus-bar of another stacked battery;One end of second conductive plate It is electrically connected with the second flow passage of the bus-bar of stacked battery, the other end and the second of the bus-bar of another stacked battery Flow passage is electrically connected.
On two respective bus-bars of stacked battery, while it is electrically connected by the first conductive plate and the second conductive plate, the One conductive plate connects the first flow passage of two respective bus-bars of stacked battery, and the second conductive plate connects two battery stacks Second flow passage of the respective bus-bar of body.Be conducive to the further conveyance capacity of increase conductive plate and reduce the thickness of bus-bar Degree.
In a kind of embodiment of the utility model, the first conductive plate in the middle part of the first flow passage length direction with connecing Touch, the second conductive plate in the middle part of the second flow passage length direction with contacting.
First conductive plate is realized and is electrically connected, and realized admittedly by welding with being contacted in the middle part of the first flow passage length direction Fixed connection;Second conductive plate is realized and is electrically connected, and realize fixation by welding with being contacted in the middle part of the second flow passage length direction Connection.
In a kind of embodiment of the utility model, conductive plate is conductive metal sheet.
In a kind of embodiment of the utility model, conductive plate is copper coin or aluminium sheet.
The bus-bar of one stacked battery and the bus-bar of another stacked battery are realized by conductive plate to be electrically connected, Conductive plate is electrically connected two bus-bars, and the material of two bus-bars differs, and one is aluminum bus-bar, another is copper Bus-bar.
The material of cell positive pole ear is aluminium, and the material of negative lug is copper;Positive pole ear and the bus-bar that material is aluminium (i.e.:Aluminum bus-bar) be electrically connected, negative lug and material for copper bus-bar (i.e.:Copper bus-bar) it is electrically connected.Conductive plate With positive pole ear or the material identical of negative lug, the welding quality between conductive plate and bus-bar can be improved.
In a kind of embodiment of the utility model, conductive plate by ultrasonic bond, macromolecule diffusion welding (DW) or soldering with The flow passage of bus-bar is fixedly connected.
In a kind of embodiment of the utility model, the bus-bar of a stacked battery and another stacked battery Bus-bar on the stacked direction of battery front and rear arrangement.
In a kind of embodiment of the utility model, the contact area of conductive plate and single bus-bar is not less than 5mm2
In a kind of embodiment of the utility model, the minimum area of passage of conductive plate is not less than 5mm2
In a kind of embodiment of the utility model, the thickness of conductive plate is not more than 1.5mm, the thickness direction of conductive plate It is parallel with the thickness direction of bus-bar.
In a kind of embodiment of the utility model, flow passage includes the first flow passage and the second flow passage, the first mistake Stream portion and the second flow passage are located at the opposite both ends of bus-bar, and connecting portion is between the first flow passage and the second flow passage;Institute The one end for stating conductive plate is electrically connected with the first flow passage, and the other end is electrically connected with the second flow passage;The quantity of conductive plate is 1. Connected between different bus-bars by single conductive plate, be conducive to improve the conveyance capacity between bus-bar.
In a kind of embodiment of the utility model, the flow passage includes the first flow passage and the second flow passage, the One flow passage and the second flow passage are located at the opposite both ends of bus-bar, connecting portion in the first flow passage and the second flow passage it Between;One end of the conductive plate is electrically connected with the first flow passage, and the second flow passage of the opposite other end and the bus-bar is electrically connected Connect;The quantity of conductive plate is 1.
In a kind of embodiment of the utility model, the flow passage includes the first flow passage and the second flow passage, the One flow passage and the second flow passage are located at the opposite both ends of bus-bar, connecting portion in the first flow passage and the second flow passage it Between;One end of the conductive plate is electrically connected with the first flow passage, and the second flow passage of the opposite other end and the bus-bar is electrically connected Connect;The quantity of conductive plate is at least 2.
The beneficial effects of the utility model:
The utility model realizes the electrical connection of the bus-bar between different stacked batteries by conductive plate, is conducive to improve Conveyance capacity between bus-bar;And be conducive to improve while being conducive to and reducing bus-bar thickness, raising energy density The conveyance capacity of bus-bar itself;In addition, the bus-bar connected by conductive plate between different stacked batteries be conducive to Relatively low cost realizes reliable welding, the welding being particularly conducive between the bus-bar of different materials.
Brief description of the drawings
Fig. 1 is battery module isometric view.
Fig. 2 is stacked battery isometric view.
Fig. 3 is the bus-bar schematic diagram of battery module.
Fig. 4 is single bus-bar schematic diagram.
Fig. 5 is conductive plate and bus-bar isometric view.
Fig. 6 is conductive plate and bus-bar schematic front view.
Fig. 7 is conductive plate and bus-bar elevational schematic view.
Fig. 8 is the battery module isometric view of embodiment two.
Fig. 9 is the conductive plate and bus-bar isometric view of embodiment two.
Description of reference numerals:
1:Stacked battery, 2:Battery, 3:Bus-bar, 31:Connecting portion, 310:Lug hole, 32:Flow passage, 321:First Flow passage, 322:Second flow passage, 4:Conductive plate, 41:First conductive plate, 42:Second conductive plate, 5:Photo frame.
Embodiment
The utility model is described in detail in following specific embodiment, but the utility model is not restricted to Following embodiments.
Embodiment one:
As shown in Figure 1 and Figure 2, the present embodiment provides a kind of battery module, including:Conductive plate 4 and two stacked batteries 1.
Stacked battery 1 includes the battery 2 and bus-bar 3 being stacked, and battery 2 is arranged in photo frame 5, can prevent electricity The short circuit of pond 2;Bus-bar 3 is fixed together with photo frame 5.
The stacked direction of the bus-bar 3 of one stacked battery 1 and the bus-bar 3 of another stacked battery 1 in battery Upper front and rear arrangement (arrangement up and down i.e. shown in Fig. 2).
As shown in Figure 2,3, 4, bus-bar 3 includes connecting portion 31 and flow passage 32, and connecting portion 31 and the lug of battery 2 are electrically connected Connect, connecting portion 31 is connected with flow passage 32, and the length direction of flow passage 32 is identical with the stacked direction of battery 2.
Connecting portion 31 is provided with lug hole 310, and the lug of battery 2 is electrically connected through lug hole 310 with connecting portion 31.
Flow passage 32 includes the first flow passage 321 and the second flow passage 322, the first flow passage 321 and the second flow passage 322 The both ends opposite positioned at bus-bar 3, connecting portion 31 is between the first flow passage 321 and the second flow passage 322.
As shown in Fig. 1,3,4,5,4 one end of conductive plate is electrically connected with the flow passage 32 of the bus-bar 3 of stacked battery 1, separately One end is electrically connected with the flow passage 32 of the bus-bar 3 of another stacked battery 1.
Conductive plate 4 and the contact area of single bus-bar 3 are not less than 5mm2, the minimum area of passage of conductive plate 4 is not less than 5mm2
Area of passage refers to the cross-sectional area of conductive plate 4, which leads with the first conductive plate 41 or the second shown in Fig. 7 The end face of battery plate 42 is parallel.
Conductive plate 4 includes the first conductive plate 41 and the second conductive plate 42, one end and the stacked battery 1 of the first conductive plate 41 The first flow passage 321 of bus-bar 3 be electrically connected, the first flow passage of the other end and the bus-bar 3 of another stacked battery 1 321 are electrically connected;One end of second conductive plate 42 is electrically connected with the second flow passage 322 of the bus-bar 3 of stacked battery 1, another End is electrically connected with the second flow passage 322 of the bus-bar 3 of another stacked battery 1.
The contact area of first conductive plate 41 and single first flow passage 321 is not less than 2.5mm2, the first conductive plate 41 Minimum area of passage is not less than 2.5mm2;The contact area of second conductive plate 42 and single second flow passage 322 is not less than 2.5mm2, the minimum area of passage of the second conductive plate 42 is not less than 2.5mm2
Conductive plate 4 in the middle part of 32 length direction of flow passage with contacting.The thickness of conductive plate 4 is not more than 1.5mm, conductive plate 4 Thickness direction it is parallel with the thickness direction of bus-bar 3.
First conductive plate 41 in the middle part of 321 length direction of the first flow passage with contacting, the second conductive plate 42 and the second overcurrent The middle part contact of 322 length direction of portion.
As shown in Fig. 1,4,5,6,7, conductive plate 4 at least covers the flow passage 32 of bus-bar 3;Preferably, conductive plate 4 is with converging Stream 3 side contacts away from battery 2 of row, and cover bus-bar 3.
Conductive plate 4 is conductive metal sheet.
Conductive plate 4 is copper coin or aluminium sheet.
Conductive plate 4 is fixedly connected by ultrasonic bond, macromolecule diffusion welding (DW) or soldering with the flow passage 32 of bus-bar 3.
Embodiment two:
As shown in Fig. 2, Fig. 8, the present embodiment provides a kind of battery module, including:Conductive plate 4 and several stacked batteries 1.
Stacked battery 1 includes bus-bar 3 and the battery 2 being stacked, conductive plate 4 and one of bus-bar 3 away from battery 2 Side contacts, and cover bus-bar 3.
As shown in Figure 2, Figure 3, Figure 4, bus-bar 3 includes connecting portion 31 and flow passage 32, and connecting portion 31 connects with flow passage 32 Connect.Connecting portion 31 is provided with lug hole 310, and the lug of battery 2 is electrically connected through lug hole 310 with connecting portion 31;Flow passage 32 Length direction it is identical with the stacked direction of battery 2.
As shown in Fig. 3, Fig. 4, Fig. 8, Fig. 9,4 one end of conductive plate is at least electrically connected with the flow passage 32 of bus-bar 3, the other end At least it is electrically connected with the flow passage 32 of another bus-bar 3;Also, conductive plate 4 in the middle part of 32 length direction of flow passage with contacting.
Flow passage 32 includes the first flow passage 321 and the second flow passage 322, the first flow passage 321 and the second flow passage 322 The both ends opposite positioned at bus-bar 3, connecting portion 31 is between the first flow passage 321 and the second flow passage 322;The conductive plate 4 one end is electrically connected with the first flow passage 321, and the other end is electrically connected with the second flow passage 322 so that different bus-bars 3 it Between realized and be electrically connected by single conductive plate 4, and the conductive plate 4 both the first flow passage 321 and second with a bus-bar 3 Flow passage 322 is electrically connected, and is electrically connected with the first flow passage 321 of another bus-bar 3 and the second flow passage 322.
The above, is only some embodiments of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art can be readily apparent that in the technical scope that the utility model discloses Change or replacement, should be covered within the scope of the utility model.The scope of protection of the utility model will with right Ask subject to the protection domain of book.

Claims (16)

  1. A kind of 1. battery module, it is characterised in that including:
    Several stacked batteries, the stacked battery include the battery and bus-bar being stacked, and the bus-bar includes connecting Socket part and flow passage, connecting portion are electrically connected with the lug of battery, and the connecting portion is connected with flow passage;
    Conductive plate, its one end are at least electrically connected with the flow passage of bus-bar, flow passage of the other end at least with another bus-bar It is electrically connected.
  2. A kind of 2. battery module as claimed in claim 1, it is characterised in that:One flow passage, institute are set on the bus-bar The quantity for stating conductive plate is 1.
  3. A kind of 3. battery module as claimed in claim 1, it is characterised in that:One flow passage, institute are set on the bus-bar The quantity for stating conductive plate is at least 2.
  4. A kind of 4. battery module as claimed in claim 1, it is characterised in that:The connecting portion is provided with lug hole, battery Lug is electrically connected through lug hole with connecting portion.
  5. A kind of 5. battery module as claimed in claim 1, it is characterised in that:In the conductive plate and flow passage length direction Portion contacts.
  6. A kind of 6. battery module as claimed in claim 1, it is characterised in that:The conductive plate at least covers the overcurrent of bus-bar Portion.
  7. A kind of 7. battery module as claimed in claim 1, it is characterised in that:The contact surface of the conductive plate and single bus-bar Product is not less than 5mm2
  8. A kind of 8. battery module as claimed in claim 1, it is characterised in that:The minimum area of passage of the conductive plate is not less than 5mm2
  9. A kind of 9. battery module as claimed in claim 1, it is characterised in that:The conductive plate and one of bus-bar away from battery Side contacts, and cover bus-bar.
  10. A kind of 10. battery module as claimed in claim 1, it is characterised in that:The flow passage includes the first flow passage and the Two flow passages, the first flow passage and the second flow passage are located at the opposite both ends of bus-bar, and connecting portion is in the first flow passage and Between two flow passages;The conductive plate includes the first conductive plate and the second conductive plate, one end of the first conductive plate and battery stack First flow passage of the bus-bar of body is electrically connected, and the first flow passage of the other end and the bus-bar of another stacked battery is electrically connected Connect;One end of second conductive plate is electrically connected with the second flow passage of the bus-bar of stacked battery, the other end and another battery Second flow passage of the bus-bar of layered product is electrically connected.
  11. A kind of 11. battery module as claimed in claim 10, it is characterised in that:First conductive plate and the first overcurrent minister The middle part contact in direction is spent, the second conductive plate in the middle part of the second flow passage length direction with contacting.
  12. A kind of 12. battery module as claimed in claim 1, it is characterised in that:The flow passage includes the first flow passage and the Two flow passages, the first flow passage and the second flow passage are located at the opposite both ends of bus-bar, and connecting portion is in the first flow passage and Between two flow passages;One end of the conductive plate is electrically connected with the first flow passage, and the other end is electrically connected with the second flow passage.
  13. A kind of 13. battery module as claimed in claim 1, it is characterised in that:The flow passage includes the first flow passage and the Two flow passages, the first flow passage and the second flow passage are located at the opposite both ends of bus-bar, and connecting portion is in the first flow passage and Between two flow passages;One end of the conductive plate is electrically connected with the first flow passage, the opposite other end and the second of the bus-bar Flow passage is electrically connected.
  14. A kind of 14. battery module as claimed in claim 1, it is characterised in that:The conductive plate is conductive metal sheet.
  15. A kind of 15. battery module as claimed in claim 1, it is characterised in that:The conductive plate is copper coin or aluminium sheet.
  16. A kind of 16. battery module as claimed in claim 1, it is characterised in that:The conductive plate is expanded by ultrasonic bond, macromolecule Dissipate weldering or soldering is fixedly connected with the flow passage of bus-bar.
CN201721311510.6U 2017-10-12 2017-10-12 A kind of battery module Active CN207353369U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721311510.6U CN207353369U (en) 2017-10-12 2017-10-12 A kind of battery module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721311510.6U CN207353369U (en) 2017-10-12 2017-10-12 A kind of battery module

Publications (1)

Publication Number Publication Date
CN207353369U true CN207353369U (en) 2018-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721311510.6U Active CN207353369U (en) 2017-10-12 2017-10-12 A kind of battery module

Country Status (1)

Country Link
CN (1) CN207353369U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111864166A (en) * 2018-06-20 2020-10-30 宁德时代新能源科技股份有限公司 Output pole piece and battery module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111864166A (en) * 2018-06-20 2020-10-30 宁德时代新能源科技股份有限公司 Output pole piece and battery module

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