CN208706757U - A kind of battery module - Google Patents

Abstract

A kind of battery module provided by the embodiments of the present application, by the way that protruding portion will be arranged around the opening of busbar connector, when the pole on battery is mounted in corresponding opening, by welding protruding portion and pole, so as to avoid exist due to the difference in height of multiple batteries and the problems such as bring welding difference.Specifically, by being provided with protruding portion on the busbar, to change the welding position on pole and busbar connector, so as to absorb multiple batteries in the tolerance of short transverse, so that the pole on busbar connector and multiple batteries is able to maintain good assembly, and then it ensure that the reliability of welding.

Description

A kind of battery module

[technical field]

This application involves energy storage device technical field more particularly to a kind of battery modules.

[background technique]

Because of the rapid development of new-energy automobile industry, new-energy automobile gradually replaces fuel-engined vehicle, has obtained increasingly wider General application.Each automobile production manufacturer is dedicated to improving battery modules to improve the course continuation mileage and security performance of automobile Energy density.Chemical system relative maturity at present hardly results in very big promotion in a short time, therefore ties to battery modules Structure design optimization, to mitigate its weight, save its occupied space, and then the energy density for improving battery modules becomes instantly Preferred option.

Since multiple battery modules are usually by multiple batteries (battery core) by the welding of the pole of busbar connector and battery, thus Realize the electrical connection between multiple batteries, it is such as in series or in parallel.But it in currently associated technology, is welded between busbar connector and pole Often there is the problems such as welding quality is poor because of the difference in height between multiple batteries.

[utility model content]

In view of this, the embodiment of the present application provides a kind of battery module, to solve the prior art due between battery Difference in height and the problems such as welding quality is poor between bring busbar connector and pole.

On the one hand, the embodiment of the present application provides a kind of battery module, comprising:

Multiple batteries, the battery include shell, coping plate and pole, and the coping plate is set to the end of the shell Portion, the pole are set on the coping plate, and the pole protrudes from the coping plate；

Busbar connector, for realizing the electrical connection between multiple batteries, two batteries of arbitrary neighborhood pass through institute State busbar connector electrical connection；Wherein, the busbar connector includes body part, opening and the protruding portion along the opening setting；The pole Column is embedded in the opening, and is connect with the inner sidewall of the protruding portion.

Preferably, the protruding portion is set to side of the ontology far from the battery.

Preferably, the opening is through-hole structure, and the through-hole structure runs through institute in the battery module short transverse State busbar connector；The busbar connector is used to absorb the difference in height between multiple batteries.

Preferably, the height of the pole is less than or equal to the height with the busbar connector being correspondingly arranged.Wherein, described Pole has the first height；There is the second height with the protruding portion that the pole is correspondingly arranged；First height is less than or waits In second height.

Preferably, the height of the protruding portion is greater than the height of the body part.

Preferably, the protruding portion is consistent with the shape for the pole being correspondingly arranged；The sections inner side of the protruding portion There is gap between wall and the portion outboard wall of the pole.

Preferably, the protruding portion is realized by laser welding mode with the pole and is connect, the inside of the protruding portion Wall is bonded with the exterior sidewall portions of the pole.

Preferably, the height of the protruding portion is 2~3 times of the thickness of the body part.

Preferably, the protruding portion and the pole are realized by electromagnetic pulse welding manner connects, the protruding portion Inner sidewall is bonded with the exterior sidewall portions of the pole.

Preferably, the battery module further includes sampling circuit board, metal contact wires；Described in the metal contact wires connection Sampling circuit board and the busbar connector；The metal contact wires have haughty and aloof, and the camber is less than the height of the protruding portion.

Preferably, the battery module further includes output stage connection sheet, and the output connection sheet is for being electrically connected multiple institutes State battery module, wherein the output stage connection sheet includes delivery outlet, and the delivery outlet has helicitic texture, the delivery outlet Electric current for the battery module exports.

Optionally, the busbar connector further includes delivery outlet, and the delivery outlet has helicitic texture, and the delivery outlet is used for institute State the electric current output of battery module.

Optionally, the pole includes positive terminal and negative terminal, wherein the positive terminal has single layer structure；It is described negative Pole has single layer structure.

A kind of battery module provided by the embodiments of the present application, by protruding portion will be arranged around the opening of busbar connector, when Pole on battery is mounted in corresponding opening, by welding protruding portion and pole, so as to avoid due to multiple batteries Difference in height exists and bring welds the problems such as poor.Specifically, by being provided with protruding portion on the busbar, to change pole Welding position on column and busbar connector, so as to absorb multiple batteries in the tolerance of short transverse, so that busbar connector and multiple Pole on battery is able to maintain good assembly, and then ensure that the reliability of welding.

[Detailed description of the invention]

Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the structural schematic diagram of battery module provided by the embodiments of the present application；

Fig. 2 is the schematic top plan view of battery module shown in Fig. 1；

Fig. 3 is the A-A cross-sectional view of battery module shown in Fig. 2；

Fig. 4 is the partial enlarged view that dotted-line ellipse outlines part in Fig. 3；

Fig. 5 is the structural schematic diagram of busbar connector 20 in Fig. 1；

Fig. 6 is the schematic top plan view of busbar connector 20 shown in Fig. 5；

Fig. 7 is the B-B cross-sectional view of battery module shown in Fig. 6；

Fig. 8 is the connection status diagram of protruding portion and pole after laser welding；

Fig. 9 is the connection status diagram of protruding portion and pole after electromagnetic pulse welding.

Appended drawing reference:

1 battery module

10 batteries

101 poles

20 busbar connectors

21 openings

22 protruding portions

23 body parts

221 contact portions

30 sampling circuit boards

31 sampling pads

32 metal contact wires

40 output stage connection sheets

41 delivery outlets

Attached drawing and appended drawing reference herein is incorporated into the specification and forms part of this specification, and shows and meets this The embodiment of application, and together with specification it is used to explain the principle of the application.

[specific embodiment]

In order to better understand the technical solution of the application, the embodiment of the present application is retouched in detail with reference to the accompanying drawing It states.

It will be appreciated that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Base Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its Its embodiment, shall fall in the protection scope of this application.

The term used in the embodiment of the present application is only to be not intended to be limiting merely for for the purpose of describing particular embodiments The application.In the embodiment of the present application and the "an" of singular used in the attached claims, " described " and "the" It is also intended to including most forms, unless the context clearly indicates other meaning.

It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

It should be noted that the nouns of locality such as "upper", "lower" described in the embodiment of the present application, "left", "right" are with attached drawing Shown in angle come what is be described, should not be construed as the restriction to the embodiment of the present application.In addition, within a context, it is also necessary to Understand, when mentioning an element and being connected to another element "upper" or "lower", can not only be connected directly between another Perhaps "lower" can also be indirectly coupled to another element "upper" or "lower" by intermediary element for one element "upper".

Inventor is by careful further investigation, for passing through in battery module in the prior art between multiple batteries The pole of busbar connector and each battery is realized by welding.Wherein, the sheet metal that busbar connector is generally integrated, by metal connecting sheet It is placed in parallel above the pole of multiple batteries, the connection of metal connecting sheet and each pole is realized by laser welding.Due to There are differences in height between multiple batteries, in order to guarantee that the distance between metal connecting sheet and the pole of each battery are consistent, generally It can take to busbar connector and apply pressure, the difference in height between battery is absorbed by the deformation of busbar connector.But with battery capacity The voltage and current for increasing i.e. output is higher, and the thickness and width to the metal connecting sheet for being applied to connection battery is also to increase accordingly Higher conveyance capacity is adapted to, results in the need for can guarantee the external force more great talent that busbar connector applies the deformation by busbar connector To absorb the difference in height between battery.But will cause the pressure born to the battery needs being located at below metal connecting sheet was also Greatly, to cause potential harm to battery, may overall performance on battery and service life cause serious influence.It is based on Inventor is to defect in the prior art, and this application provides a solution, and specifically as shown in FIG. 1 to FIG. 9, the application is mentioned A kind of battery module supplied, by the way that setting protruding portion will be surround around the opening of busbar connector, when the pole on battery is mounted on In corresponding opening, by laser welding protruding portion and pole, exist and band so as to avoid due to the difference in height of multiple batteries The problems such as poor welding quality come.

Specifically as shown in FIG. 1 to FIG. 9, it includes multiple batteries, the electricity that the embodiment of the present application, which provides a kind of battery module, Pond includes shell, coping plate and pole, and the coping plate is set to the end of the shell, and the pole is set to the top cover On piece, and the pole protrudes from the coping plate；Busbar connector, for realizing the electrical connection between multiple batteries, arbitrarily Two adjacent batteries are electrically connected by the busbar connector；Wherein, the busbar connector includes body part, is open and along described Be open the protruding portion being arranged；The pole is embedded in the opening, and is connect with the inner sidewall of the protruding portion.

Specifically, as shown in FIG. 1 to 3, which includes multiple batteries 10, busbar connector 20 and sample circuit Plate 30, wherein multiple batteries for being electrically connected to each other by busbar connector 20, and sampling circuit board 30 is for acquiring on battery 10 Temperature data and/or voltage data, while sampling circuit board 30 passes through external connection battery management system CSC, to realize to battery The control signal of module 1.Wherein, it should be noted that battery is it can be appreciated that battery core in this application.

Wherein, multiple batteries 10 are disposed adjacent along preset direction, by the formation each other in series or parallel of multiple batteries 10 The main part of battery module 1.Multiple batteries 10 are mutually independent, and there are two poles 101 for each tool of battery 10, further include Shell and coping plate, coping plate are set to the end of shell, and pole is set on coping plate, and pole protrudes from coping plate.Its In, pole 101 respectively includes positive terminal and negative terminal, battery 10 by the way that positive/negative pole is realized and the electrical connection of extraneous component, Such as it is powered or charges.Wherein, in application embodiment, positive terminal has single layer structure；Negative terminal has single layer knot Structure.Specifically, positive terminal is single layer aluminum sheet structure, and negative terminal can be single layer copper sheet structure.It is born in compared with the existing technology Pole is generally for Copper-Aluminum compound double-layer structure, and structure is simple.It can be welded in the embodiment of the present application by electromagnetic pulse (EMPT) negative terminal for carrying out single layer copper sheet structure is connect with busbar connector.In addition, in the embodiment of the present application, pole with a thickness of 2~3mm, the pole of middle 4mm or more is frivolous much compared with the existing technology, while being also save the cost.

It is electrically connected since battery 10 needs to realize between each other, in the embodiment of the present application the two of arbitrary neighborhood battery 10 Between by busbar connector 20 realize electrical connection.It specifically, is by busbar connector 20 respectively at by two adjacent batteries 10 Opposite polarity two poles connection, to realize the series connection between two adjacent batteries 10.Specifically as shown in 2 and Fig. 3, example Such as by the way that one end of busbar connector 20 to be connected on the positive terminal of a battery 10, the other end of busbar connector 20 is connected to a battery 10 Negative terminal on electrical connection to both realize.It should be noted that can wrap in battery module 1 in application embodiment Include multiple busbar connectors 20 (as shown in Figures 2 and 3) being separated from each other, be also possible to include an integrated formed structure confluence Row.

In application embodiment, by being provided with protruding portion on the busbar, to change the weldering on pole and busbar connector Position is connect, so as to absorb multiple batteries in the tolerance of short transverse, enables pole on busbar connector and multiple batteries Good assembly is enough kept, and then ensure that the reliability of laser welding or electromagnetic pulse welding.Specifically as shown in Fig. 5~Fig. 7, Busbar connector 20 includes at least one opening 21, along the protruding portion 22 and body part 23 of the setting of opening 21, certainly more at one In preferred embodiment, protruding portion 22 can be around 21 setting of opening, and body part 23 and protruding portion 22 are to be integrally formed knot Structure.Wherein, which is through-hole structure, which runs through busbar connector 20, the remittance in 1 short transverse of battery module Stream row is for absorbing the difference in height between multiple batteries.It should be understood that the protruding portion 22 in present specification is that setting exists The body part 23 of busbar connector 20 is far from the side of battery 10, and protruding portion 22 and 23 approximation of body part are arranged in a mutually vertical manner, wherein The height of the protruding portion 22 is greater than the height of body part 23.In addition, in order to guarantee electromagnetic pulse welding (EMPT) or Laser Welding The reliability connect, present inventor by further investigation, the height H22 of protruding portion 22 be the thickness T23 of body part 23 2~ At 3 times, good welding effect may be implemented.If the height of protruding portion 22 is too low, it is insufficient etc. to will lead to welding Problem.If the excessive height of protruding portion 22,20 integral thickness of busbar connector can caused to increase, be unable to reach loss of weight Purpose.

With continued reference to shown in Fig. 3~Fig. 5, pole 101 on busbar connector 20 and corresponding battery 10 in the embodiment of the present application Connection type are as follows: by pole 101 being entrenched in the opening 21 for the busbar connector 20 being correspondingly arranged, and in protruding portion 22 Side wall connection, and protruding portion 22 is around corresponding pole 101.As shown in figure 4, protruding portion 22 and the pole 101 being correspondingly arranged Shape it is consistent；And protruding portion 22 has gap with pole 101, that is, the internal diameter of protruding portion 22 is greater than the outer of pole before welding Diameter.It thereby may be ensured that the pole on battery can be entrenched in corresponding opening 21, subsequent welding procedure facilitated to guarantee weldering The reliability connect.In addition, the height of the protruding portion 22 is greater than the height of body part 23.

With continued reference to shown in Fig. 4, in order to further enhance the agreeing with property of assembly of protruding portion 22 and corresponding pole 101, Corresponding pole 101 has the first height H101 in the embodiment of the present application, and the protruding portion 22 being correspondingly arranged with pole has second Height H22；Wherein, the first height H101 is less than or equal to the second height H22.The purpose being designed in this way, not only to guaranteeing weldering The reliability connect；And for preventing that pole is too long and bring other short-circuit risks etc..

In addition, it is necessary to explanation: the protruding portion in the embodiment of the present application on busbar connector passes through welding with corresponding pole Technique realizes connection.Specifically as shown in Fig. 4, Fig. 8 and Fig. 9, before not welded, have between protruding portion and corresponding pole Prepsetting gap.In the application embodiment, welding manner can be electromagnetic pulse welding, laser welding or electron beam welding etc. Welding technique.Wherein, if needing to guarantee that opening 21 and the fit-up gap of pole 101 are less than using welding such as laser and electron beams The 1/5 of 22 thickness of protruding portion, can ensure good welding effect.For if then being opened using electromagnetic pulse welding procedure The fit-up gap of mouth 21 and pole 101 is about 0.5-1.5mm or fit-up gap can be 1/2 times to 1 of 22 thickness of protruding portion Between times, assembling not only can be improved, while soldering reliability can be further improved by electromagnetic pulse welding procedure.

After proceeding through welding, as shown in Figure 8 and Figure 9, protruding portion 22 is connected together with corresponding pole 101, After wherein in Fig. 8 using laser welding process high-temperature fusion, the inner surface of protruding portion 22 and the pole 101 that is correspondingly arranged Appearance face contact.Specifically, protruding portion 22 fits together i.e. with corresponding pole 101 substantially: forming protruding portion 22 Inner sidewall is bonded with the realization of the lateral wall of pole 101.Certainly in the embodiment of the present application, protruding portion 22 and corresponding pole 101 It can partially fit together, that is to say, that the sections inner side wall of protruding portion 22 and the portion outboard wall of corresponding pole 101 can With there are certain intervals.But using electromagnetic pulse welding after, as shown in figure 9, in protruding portion 22 between corresponding pole 101 shape At contact portion 221, the inner sidewall for forming protruding portion 22 is bonded with the lateral wall of pole 101, and the partial region of protruding portion 22 and There is certain interval between pole 101.In addition, in the embodiment of the present application, in the protruding portion 22 after electromagnetic pulse is welded Inner sidewall can also be bonded with the lateral wall of pole 101.

In addition, continuing to refer to figure 1 with shown in Fig. 2, which further includes connection sampling circuit board 30 and busbar connector 20 metal contact wires 32, wherein further including sampling pad 31 on sampling circuit board 30.Specifically, the one of metal contact wires 32 End is connected on sampling pad 31, and the other end of metal contact wires 32 is connected on corresponding busbar connector 20, for realizing to phase The temperature data and/or voltage data for the battery answered acquire and provide all kinds of control signals.In addition, due in the embodiment of the present application By being provided with protruding portion 22 on busbar connector 20, not only avoid to the mutual difference in height of battery 10 and bring failure welding It influences, simultaneously as the presence of protruding portion 22, has certain altitude and accommodation space, may be implemented to metal contact wires 32 Protection, in the embodiment of the present application, the haughty and aloof H32 that metal contact wires 32 have are less than the height H22 of protruding portion 22, such as Fig. 7 institute Show, wherein it should be noted that the haughty and aloof H32 of metal contact wires 32 refers to from the bottom of metal contact wires 32 to highest point of arching upward Between vertical range.Therefore in the embodiment of the present application, by the way that the haughty and aloof H32 setting of metal contact wires 32 is less than protruding portion 22 Height H22, to the touching of metal contact wires 32 or weighed wounded so as to upper cover plate for avoiding battery module etc., while can also be with It rationally is formed by inner space using protruding portion, thus can be in arrangement metal contact wires 32 etc. in this inner space.

In addition, continuing to participate in shown in Fig. 1 and Fig. 2, which further includes output stage connection sheet 40, output connection Piece 40 is for being electrically connected multiple battery modules, wherein each output stage connection sheet 40 further includes delivery outlet 41, the delivery outlet 41 tool There is helicitic texture, can be used for mutually assembling the battery module 1 and other battery modules, while the delivery outlet generally comprises anode Delivery outlet and cathode delivery outlet, the electric current for battery module export.

The battery module as provided by the embodiment of the present application, by will be protruded around the opening of busbar connector around setting Portion, when the pole on battery is mounted in corresponding opening, by welding protruding portion and pole, so as to avoid due to multiple electricity The difference in height in pond exists and bring welds the problems such as poor.Specifically, by being provided with protruding portion on the busbar, to change Welding position on pole-changing column and busbar connector, so as to absorb multiple batteries in the tolerance of short transverse, so that busbar connector It is able to maintain good assembly with the pole on multiple batteries, and then ensure that the reliability of welding.

The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.

Claims (10)

1. a kind of battery module characterized by comprising

Multiple batteries, the battery include shell, coping plate and pole, and the coping plate is set to the end of the shell, institute It states pole to be set on the coping plate, and the pole protrudes from the coping plate；

Busbar connector, for realizing the electrical connection between multiple batteries, two batteries of arbitrary neighborhood pass through the remittance Stream row's electrical connection；

Wherein, the busbar connector includes body part, opening and the protruding portion along the opening setting；

The pole is embedded in the opening, and is connect with the inner sidewall of the protruding portion.

2. battery module according to claim 1, which is characterized in that the protruding portion is set to the ontology far from described The side of battery.

3. battery module according to claim 2, which is characterized in that the opening is through-hole structure, the through-hole structure Run through the busbar connector in the battery module short transverse；

The busbar connector is used to absorb the difference in height between multiple batteries.

4. battery module according to claim 1 or 3, which is characterized in that the height of the pole be less than or equal to it is right The height for the protruding portion that should be arranged.

5. battery module according to claim 1 or 3, which is characterized in that the height of the protruding portion is greater than the ontology The height in portion.

6. battery module according to claim 5, which is characterized in that the protruding portion and the pole that is correspondingly arranged Shape is consistent；

There is gap between the sections inner side wall of the protruding portion and the portion outboard wall of the pole.

7. battery module according to claim 6, which is characterized in that the protruding portion and the pole pass through laser welding Mode realizes connection, and the inner sidewall of the protruding portion is bonded with the exterior sidewall portions of the pole.

8. battery module according to claim 5, which is characterized in that the height of the protruding portion is the thickness of the body part 2~3 times of degree.

9. battery module according to claim 8, which is characterized in that the protruding portion and the pole pass through electromagnetic pulse Welding manner realizes connection, and the inner sidewall of the protruding portion is bonded with the exterior sidewall portions of the pole.

10. battery module according to claim 1 or 3, which is characterized in that the battery module further includes sample circuit Plate, metal contact wires；

The metal contact wires connect the sampling circuit board and the busbar connector；

The metal contact wires have haughty and aloof, and the camber is less than the height of the protruding portion.