CN103698580A - Battery voltage and temperature collection system - Google Patents
Battery voltage and temperature collection system Download PDFInfo
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- CN103698580A CN103698580A CN201310745374.1A CN201310745374A CN103698580A CN 103698580 A CN103698580 A CN 103698580A CN 201310745374 A CN201310745374 A CN 201310745374A CN 103698580 A CN103698580 A CN 103698580A
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Abstract
The invention discloses a battery voltage and temperature collection system, which relates to the technology of electric car accessories, and solves the problems in the prior art that such as difficulty in wire distribution, high cost and poor temperature collection accuracy caused by collecting the voltage and temperature of a battery. The battery voltage and temperature collection system comprises a plurality of battery modules which are connected with one another, wherein each battery module comprises a plurality of cells which are connected in serial or in parallel, a positive end and a negative end of each cell in each battery module are respectively connected with a collection column, and the collection column is connected with a collection plate; the collection plate is provided with a voltage temperature collection device; the collection device is connected with the collection column, and the collection device is also connected with a main control board. The battery voltage and temperature collection system is mainly applied to the electric car.
Description
Technical field
The present invention relates to electric automobile accessory technology, relate in particular to a kind of cell voltage, temperature acquisition system.
Background technology
Along with the development of society's science and technology, electric automobile is energy-conservation with its high-environmental, lightly convenient and cheap advantage more and more obtains people's favor, applies also more and more general.
Wherein, the power source of electric automobile is electric energy, therefore, conventionally selects the power brick of lithium battery formation as the energy-storage units of electric automobile.Wherein, lithium battery has that energy density is high, volume is little, power density high, adopts lithium battery to become current electric automobile main flow developing direction as energy-storage units.When practical application, because lithium battery is comparatively responsive for voltage and temperature, the subtle change that is voltage and temperature all can produce serious influence to battery performance performance, Given this, in order to give full play to battery actual performance, to improve electric automobile course continuation mileage, can adopt battery management system as shown in Figure 1 to carry out the running status of monitoring battery, be voltage and the temperature of monitoring battery, thereby guarantee that battery always works in efficient, stable duty.
Particularly, as shown in Figure 1, this battery management system comprises a plurality of battery modules 11, each battery modules 11 comprises that a plurality of series connection (are preferably series connection, also can be parallel connection) battery core 12 that connects, and between adjacent battery core 12 by bus 13 be connected (also need between a plurality of battery modules 11 connect, serial or parallel connection, identifies in Fig. 1).In Fig. 1, also include collection plate 14, collection plate 14 is connected with the positive and negative electrode of each battery core 12 by voltage acquisition wire harness 15, thereby collection plate 14 can collect the positive and negative electrode magnitude of voltage of each battery core 12; Again by a plurality of (limited) temperature acquisition wire harness 16 and battery modules 11 local-connections (temp probe 161), thereby collection plate 14 can collect the temperature of battery modules; Finally collection plate 14 is connected by CAN bus 18 with master control borad 17, and then completes voltage and the temperature of controlling battery core 12 by master control borad 17.This wherein, collection plate 14 is provided with voltage, temperature sensor, for gathering voltage and the temperature of battery core 12; Between collection plate 14 and master control borad 17, be connected with power lead 19.
Yet, in existing voltage acquisition mode, owing to needing to be connected with collection plate by voltage acquisition wire harness for each battery core, therefore for the battery modules that comprises a plurality of battery cores, need to connect by a large amount of voltage acquisition wire harness the positive and negative electrode of each battery core.In Fig. 1, can find out, each battery modules comprises N battery core, needs N+1 bar voltage acquisition wire harness to complete connection, for electric automobile, conventionally adopts the battery modules more than 100 battery cores, needs 101 above voltage acquisition wire harness.Too much wire harness not only can increase the cost of battery modules, also can cause difficulty to the layout of wire harness, installation and fixing etc.; And the in the situation that of certain in battery modules space, too much wire harness takes up space more, cause the arrangement space of battery core to reduce, the quantity of battery core reduces, and reduces the driveability of electric automobile; In addition, when electric automobile is surprisingly subject to clash into waiting, these wire harness are easily being got lines crossed, short circuit, on fire etc., and electric automobile and passenger safe produced to serious threat, cause the loss of life and property.
Simultaneously, in existing temperature acquisition mode, as shown in Figure 1, temperature acquisition wire harness only with battery modules local-connection, limited temperature value of regional area in battery modules only detected, this kind of method cannot truly reflect the state of temperature of each battery core, the temperature value in certain region in reaction cell module that can only be local.For example, in Current Temperatures probe positions, temperature acquisition value is correct, but certain adjacent battery core temperature is the value of overstepping the extreme limit, now this temp probe can not detect this temperature value that transfinites, and causes measured temperature to have deviation, if continue in this case to use this battery modules, will cause the monomer of battery core in it to damage, produce major accident.As increased temperature sampling probe in prior art, the problem occurring in the time of can producing similar voltage acquisition, increases a large amount of temperature acquisition wire harness, increases wiring difficulty, increases cost, and cause the security of product to reduce.
Summary of the invention
Embodiments of the invention provide a kind of cell voltage, temperature acquisition system, have solved that in prior art, to gather difficult wiring, cost that cell voltage, temperature cause high, and the problem of temperature acquisition poor accuracy.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of cell voltage, temperature acquisition system, comprise a plurality of battery modules that are connected, each battery modules comprises the battery core of a plurality of serial or parallel connections, described in each in battery modules, the positive and negative collection post that is extremely all connected with of battery core described in each, described collection post is connected with collection plate; Described collection plate is provided with voltage temperature harvester; Described harvester is connected with described collection post, and described harvester is also connected with master control borad.
Wherein, described collection plate is one, and is positioned at the upper end side of described battery core.
Particularly, the positive and negative conductive strips that are extremely equipped with of battery core described in each; Between adjacent described battery core, by described conductive strips, connect, described collection post is located on described conductive strips.
Connected mode between conductive strips and battery core can be, Laser Welding (LBW) between the lug of described conductive strips and described battery core, ultrasonic bond is connected or bolt connects.
Wherein, described conductive strips comprise rectangular-shaped lath, and the opposite end of described lath is provided with extension end face in the same way; Two of described lath are extended end face and are attached to respectively described cell polar ear surface; Described collection post is vertical state setting on described lath.
Be specifically as follows, described collection post is rectangular parallelepiped copper post, and is welded to connect or one-body molded setting between described collection post and described conductive strips.
The connected mode that gathers post and collection plate can be that described collection post passes described collection plate jointly, and is connected with described collection plate soldering or clamping connection.
Preferably, described harvester comprises the single-chip microcomputer being located on described collection plate and the voltage temperature sensor being connected with described single-chip microcomputer; Described voltage temperature sensor closes on the setting of described collection post, and is connected with described collection post.
Conventionally, between described single-chip microcomputer and described master control borad, by controller local area network, communicate by letter.
The another kind of implementation that uses collection plate, described collection plate is a plurality of, and with the corresponding setting one by one of described battery core; Described in each the positive and negative extreme collection post of battery core all corresponding with self described collection plate connect; Described in each, on collection plate, be equipped with described harvester, a plurality of described harvesters are connected with a described master control borad.
In the cell voltage that the embodiment of the present invention provides, temperature acquisition system, in each battery modules, include the battery core of a plurality of serial or parallel connections, and a plurality of battery modules also connect each other, in each battery modules, the distolateral collection post that is all connected with of positive and negative electrode of each battery core, then be connected with collection plate by gathering post, collection plate is provided with voltage temperature harvester, this harvester was both connected with collection post, was also connected with master control borad.Analyze thus known, in the present embodiment, by the positive and negative electrode in each battery core, connect and gather post, again by the voltage temperature harvester being connected with collection post on collection plate, can complete the voltage of each battery core and the collection of temperature, again the data transmission of collection is controlled in master control borad, simple in structure, rationally distributed, avoided using too much gathering wire harness, reduced cost; And harvester is by gathering the temperature data that post can each battery core of Real-time Collection, thereby monitor more accurately the state of temperature of each battery core, the performance and the security that improve battery core; In addition, while there is the situations such as shocks when automobile, between collection post, can not get lines crossed, short circuit, the situation such as on fire, improve Product Safety.
Accompanying drawing explanation
Fig. 1 is battery management system structural representation in prior art;
The cell voltage that Fig. 2 provides for the embodiment of the present invention, the structural representation of temperature acquisition system;
Fig. 3 is local amplification front elevation in circular dashed line block diagram in Fig. 2;
Fig. 4 is local enlarged side view in circular dashed line block diagram in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention cell voltage, temperature acquisition system are described in detail.
The embodiment of the present invention provides a kind of cell voltage, temperature acquisition system, as shown in Figures 2 to 4, comprise a plurality of battery modules that are connected 21, each battery modules 21 comprises the battery core 22 of a plurality of serial or parallel connections, in each battery modules 21, positive and negative being extremely all connected with of each battery core 22 gathers post 31, gathers post 31 and is connected with collection plate 23; Collection plate 23 is provided with voltage temperature harvester 24; Harvester 24 is connected with collection post 31, and harvester 24 is also connected with master control borad 25.
In the cell voltage that the embodiment of the present invention provides, temperature acquisition system, in each battery modules, include the battery core of a plurality of serial or parallel connections, and a plurality of battery modules also connect each other, in each battery modules, the distolateral collection post that is all connected with of positive and negative electrode of each battery core, then be connected with collection plate by gathering post, collection plate is provided with voltage temperature harvester, this harvester was both connected with collection post, was also connected with master control borad.Analyze thus known, in the present embodiment, by the positive and negative electrode in each battery core, connect and gather post, again by the voltage temperature harvester being connected with collection post on collection plate, can complete the voltage of each battery core and the collection of temperature, again the data transmission of collection is controlled in master control borad, simple in structure, rationally distributed, avoided using too much gathering wire harness, reduced cost; And harvester is by gathering the temperature data that post can each battery core of Real-time Collection, thereby monitor more accurately the state of temperature of each battery core, the performance and the security that improve battery core; In addition, while there is the situations such as shocks when automobile, between collection post, can not get lines crossed, short circuit, the situation such as on fire, improve Product Safety.
It should be noted that herein, between a plurality of battery modules 21, also need to connect (serial or parallel connection), in Fig. 2, in each battery modules 21, the lug 221(not being connected with adjacent battery core 22 of leftmost side battery core 22 can be negative or positive electrode) between can interconnect, thereby realize the connection of 21 of a plurality of battery modules.Meanwhile, this lug 221 of each battery modules 21, usually used as the voltage acquisition initial value of respective battery module 21, simultaneously for the ease of measuring the temperature of leftmost side battery core 22, need to make this lug 221 connect separately a collection post 31.In like manner, the rightmost side battery core 22 of each battery modules 21 also adopts aforesaid way to connect, arrange.Wherein, for the lug label connecting between adjacent battery core 22, be 222, for the battery core 22 lug labels that are connected with other battery modules, be 221.
In addition, Fig. 3 and Fig. 4 are the local enlarged diagram of circular dashed line block diagram in Fig. 2, and Fig. 3 is front elevation, and Fig. 4 is side view.
Specifically in use, can use a plurality of collection plates 23, and a plurality of collection plates 23 respectively with the battery core 22 corresponding setting one by one of each battery modules 21, thereby the collection post 31 of the positive and negative extreme connection of each battery core 22 all collection plate corresponding with self 23 connects, and on each collection plate 23, be equipped with harvester 24, finally again by each harvester 24 is connected with a master control borad 25.This kind of mode gathers respectively voltage and the temperature of each battery core 22 by independently collection plate 23 and harvester 24, do not have each other any interference, and the data deviation collecting is little, and precision is high, and is convenient to the independent control to each battery core 22.Now, gathering post 31 can directly be fixed on the lug of battery core 22 by modes such as welding, and between adjacent battery core 22, also needs extra wire or bus etc. to connect (between battery modules 21, also needing to connect).
While stating monitor mode in the use, because common needed battery core 22 quantity of electric automobile are more, required collection plate 23 and harvester 24 are also more, cause cost raising, layout difficulty to strengthen.Given this, as shown in Figure 2, can adopt single collection plate 23, this collection plate 23 is positioned at the upper end side of battery core 22, and wherein, for each battery modules 21, all correspondence is provided with a collection plate 23.
Particularly, in each battery modules 21, between a plurality of battery cores 22, need serial or parallel connection, the positive and negative of each battery core 22 extremely also needs connection to gather post 31 simultaneously, now consider that between adjacent battery core 22, interconnective positive and negative extreme voltage is identical, temperature is identical, therefore can, when adjacent battery core 22 is connected, by a collection post 31, complete the voltage temperature data acquisition of this connected position.Be specifically as follows, as shown in Figure 3 and Figure 4, the positive and negative conductive strips 32 that are extremely equipped with of battery core 22, and by conductive strips 32, connect between adjacent battery core 22, the corresponding post 31 that gathers is located on conductive strips 32, thereby by conductive strips 32, can realize the connection between battery core 22, by being located at the collection post 31 on conductive strips 32, can facilitate the voltage temperature data acquisition of this position simultaneously.
In Fig. 2, the join domain 26 of adjacent battery core 22 all needs to arrange conductive strips 32, to complete the connection between battery core 22.In conjunction with Fig. 3 and Fig. 4, can find out, conductive strips 32 comprise rectangular-shaped lath 321, at the opposite end of lath 321, are provided with in the same way extension end face, thereby extend end faces by two, are attached to battery core 22 lugs surfaces, complete fixing.Wherein, for the lug 222 between adjacent battery core 22, connect, the structure that conductive strips 32 can be as shown in Figure 3, two are extended the outside surface side that end faces are attached to respectively two lugs 222, are similar to housing structure, complete the connection of adjacent battery core 22; And for the lug that need to be connected with other battery modules 21, routine as noted above lug 221, now also needs conductive strips 32 to connect, on the conductive strips 32 of this lug 221 of each battery modules 21, all need to arrange a collection post 31 simultaneously.Wherein, two of conductive strips 32 as shown in Figure 3 extend on end faces 322, also can be in opposite directions, level is provided with extension, thus by extension, is connected with lug 222, facilitate and weld.
Conventionally, between conductive strips 32 and battery core 22 lugs, can be fixedly connected with by the mode of the higher Laser Welding (LBW) of reliability or ultrasonic bond, now because these two kinds of welding manner reliabilities are stronger, therefore the mode that conductive strips 32 can be as shown in Figures 2 and 3, lath 321 is fillet structure, and two extension end faces are also less, save material.Certainly, also can increase the structure size of conductive strips 32, thereby by bolt connecting mode connecting tab and the conductive strips 32 of convenient disassembly, concrete selection mode can be decided according to the actual requirements.
This wherein, when collection post 31 is fixed on conductive strips 32, owing to gathering post 31, also need to connect, support collection plate 23, therefore gathering post 31 can be fixed on lath 321 with vertical state, thereby a plurality of collection posts 31 are arranged in parallel, when collection plate 23 is fixed on collection post 31, can guarantee fixedly stationarity and the horizontality of collection plate 23.In addition, in order to save the cost of collection plate 23, conventionally by gathering post 31, be located at the marginal end (conductive strips 32 are also located at marginal end accordingly) of corresponding lug, thereby dwindle the space size in a plurality of collection posts 31 besieged cities.
Preferably, gathering post 31 can be rectangular parallelepiped copper post, and is fixedly connected with conductive strips 32 by the mode of welding, or in order further to improve switching performance, simplifies process operation, can will gather post 31 and the one-body molded setting of conductive strips 32.Wherein, gathering post 31 can be also the structures such as cylindric, taper, and be preferably conduction, copper product that heat conductivility is good is made, and can certainly adopt other metal materials.
Equally, in order to improve stable connection, the reliability that gathers post 31 and collection plate 23, can a plurality of collection posts 31 are common through collection plate 23, between the two and by soldering or connect and fix connection.When adopting soldering, solder joint can be directly connected with wire etc., so that collection post 31 is connected with harvester 24; When the clamping, conductiving point also can be set in the position with pores of collection plate 23, in the time of in the perforate that gathers post 31 and be located in collection plate 23, it can contact with above-mentioned conductiving point.
When practical application, harvester 24 can comprise the single-chip microcomputer 28 being located on collection plate 23, and the voltage temperature sensor 29 being connected with single-chip microcomputer 28 by circuit board wire 241.Wherein, for the ease of gathering more fast and accurately the data such as voltage, temperature of battery core 22, voltage temperature sensor 29 can being located at, close on the position that gathers post 31, and with gather post 31 and be connected.When voltage temperature sensor 29 collects by gathering post 31 after the voltage, temperature data of battery core 22, by circuit board wire 241, be transferred to single-chip microcomputer 28, last single-chip microcomputer 28 is communicated by letter by controller local area network, be that CAN bus 27 is transferred to master control borad 25, thereby in master control borad 25, complete monitoring and the control of battery core voltage, temperature.
Wherein, owing to gathering post 31 and be positioned at the lug position of battery core 22, so measured temperature be also the positive and negative electrode region of battery core 22, need to be through mathematical algorithm in single-chip microcomputer 28 or master control borad 25, derive battery core inside with and surperficial actual temperature.
In description of the invention, it will be appreciated that, orientation or the position relationship of the indications such as term " " center ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, so can not be interpreted as limitation of the present invention.
In description of the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
In the description of this instructions, specific features, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection domain with claim.
Claims (10)
1. a cell voltage, temperature acquisition system, comprise a plurality of battery modules that are connected, each battery modules comprises the battery core of a plurality of serial or parallel connections, it is characterized in that, described in each in battery modules, the positive and negative collection post that is extremely all connected with of battery core described in each, described collection post is connected with collection plate;
Described collection plate is provided with voltage temperature harvester; Described harvester is connected with described collection post, and described harvester is also connected with master control borad.
2. cell voltage according to claim 1, temperature acquisition system, is characterized in that, described collection plate is one, and be positioned at the upper end side of described battery core.
3. cell voltage according to claim 2, temperature acquisition system, is characterized in that, the positive and negative conductive strips that are extremely equipped with of battery core described in each;
Between adjacent described battery core, by described conductive strips, connect, described collection post is located on described conductive strips.
4. cell voltage according to claim 3, temperature acquisition system, is characterized in that, Laser Welding (LBW) between the lug of described conductive strips and described battery core, ultrasonic bond is connected or bolt connects.
5. cell voltage according to claim 4, temperature acquisition system, is characterized in that, described conductive strips comprise rectangular-shaped lath, and the opposite end of described lath is provided with extension end face in the same way;
Two of described lath are extended end face and are attached to respectively described cell polar ear surface; Described collection post is vertical state setting on described lath.
6. cell voltage according to claim 5, temperature acquisition system, is characterized in that, described collection post is rectangular parallelepiped copper post, and be welded to connect or one-body molded setting between described collection post and described conductive strips.
7. cell voltage according to claim 6, temperature acquisition system, is characterized in that, described collection post passes described collection plate jointly, and be connected with described collection plate soldering or clamping connection.
8. cell voltage according to claim 7, temperature acquisition system, is characterized in that, described harvester comprises the single-chip microcomputer being located on described collection plate and the voltage temperature sensor being connected with described single-chip microcomputer;
Described voltage temperature sensor closes on the setting of described collection post, and is connected with described collection post.
9. cell voltage according to claim 8, temperature acquisition system, is characterized in that, between described single-chip microcomputer and described master control borad, by controller local area network, communicates by letter.
10. cell voltage according to claim 1, temperature acquisition system, is characterized in that, described collection plate is a plurality of, and with the corresponding setting one by one of described battery core;
Described in each the positive and negative extreme collection post of battery core all corresponding with self described collection plate connect; Described in each, on collection plate, be equipped with described harvester, a plurality of described harvesters are connected with a described master control borad.
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| CN108181019A (en) * | 2018-01-15 | 2018-06-19 | 惠州亿纬锂能股份有限公司 | A kind of test method of battery overcharge maximum temperature |
| CN109148993A (en) * | 2018-08-15 | 2019-01-04 | 北京海博思创科技有限公司 | Cell apparatus and new-energy automobile |
| CN111293266A (en) * | 2020-02-26 | 2020-06-16 | 中航锂电（洛阳）有限公司 | Battery module |
| CN111564660A (en) * | 2020-06-19 | 2020-08-21 | 义乌易换骑电池有限公司 | Lithium battery pack capable of preventing voltage acquisition interference |
| CN113300010A (en) * | 2020-09-29 | 2021-08-24 | 欣旺达电动汽车电池有限公司 | Battery cell, battery system and electric automobile |
| CN113471555A (en) * | 2020-09-29 | 2021-10-01 | 欣旺达电动汽车电池有限公司 | Intelligent battery core, battery system and electric automobile |
| CN113300010B (en) * | 2020-09-29 | 2023-04-07 | 欣旺达电动汽车电池有限公司 | Battery cell, battery system and electric automobile |
| CN114487836A (en) * | 2022-01-26 | 2022-05-13 | 上海玫克生智能科技有限公司 | Battery state analysis method, system and terminal based on voltage and temperature |
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