WO2012044065A2

WO2012044065A2 - Battery pack and a battery pack assembly equipped therewith

Info

Publication number: WO2012044065A2
Application number: PCT/KR2011/007145
Authority: WO
Inventors: 홍인관; 최수영; 김형중
Original assignee: 주식회사 명신이엔지
Priority date: 2010-09-29
Filing date: 2011-09-28
Publication date: 2012-04-05
Also published as: WO2012044065A3; KR101174045B1; KR20120033044A

Abstract

The present invention relates to a battery pack and to a battery pack assembly equipped therewith, and, more specifically, relates to a battery pack which allows the user to configure a straightforward system and is integrated to the extent of incorporating a selective BMS (protective circuit), the battery pack comprising: a ventilating structure which stably supports a single cell and can easily be adjusted so as to connect a plurality of cells in a selective fashion; and a connect port which is able to transmit data and the battery state (voltage and temperature) outside itself such that the battery state can be monitored. The present invention also relates to a battery pack assembly equipped with the battery pack.

Description

Battery pack and battery pack assembly having same

This application claims the priority of Korean Patent Application No. 10-2010-0094637, filed September 29, 2010, all the contents disclosed in the specification and drawings of that application are incorporated herein by reference.

The present invention relates to a battery pack and a battery pack assembly having the same, and more particularly, to stably support a single cell, and to easily assemble a plurality of cells to be selectively connected, as well as between neighboring cells. The present invention relates to a battery pack and a battery pack assembly including the same, wherein vent holes are formed to ensure insulation and lower a temperature of a battery.

In general, the demand for thin rectangular batteries and pouch-type batteries is increasing. In particular, there is a high interest in a pouch-type battery which is easily modified in shape, inexpensive to manufacture, and low in weight. In addition, the pouch-type battery is being developed and commercialized using a power source of an electric vehicle or a hybrid electric vehicle (hereinafter, collectively referred to as an “electric vehicle”) that requires high output and large capacity.

The pouch-type battery is a secondary battery capable of charging and discharging, comprising an electrode assembly in which a positive electrode plate, a separator, and a negative electrode plate are sequentially disposed, and an exterior member sealingly storing the electrode assembly together with an electrolyte (hereinafter, referred to as a "pouch"). do. At this time, the pouch is formed to seal the electrode assembly protruding along the edge of the electrode assembly is sealed, in order to reduce the volume of the battery is used by folding or cutting the sealing portion.

When the pouch type secondary battery is used as a power source for an electric vehicle, several to dozens of batteries are connected and used. In this case, a battery assembly in which a plurality of batteries are connected has a structure in which a plurality of electrode assemblies are stacked or a plurality of single batteries are connected and fastened for the purpose of minimizing volume and ease of assembly.

In assembling and using a plurality of batteries, it is necessary to ensure insulation between the batteries and to maintain the proper temperature for each battery, depending on the vibration of the vehicle, the external environment, and the requirements of the use of the batteries for optimum performance. Requirements must be met.

However, when a plurality of batteries are connected, there is a problem of stably supporting each battery without sacrificing a volume and meeting a required condition, and there is no device for assembling the batteries, thereby degrading the safety of the battery and the performance of using the battery. .

In addition, there is a problem in that the structure is complicated because the terminals of each battery are insulated from each other when the plurality of batteries are connected, and they must be selectively connected in series or in parallel.

The present invention has been made to solve the above problems, a battery pack and a battery pack having a simple structure that not only stably protect the battery, but also to minimize the increase in volume and to facilitate the combination of a plurality of cells; The purpose is to provide an assembly.

Another object of the present invention is to ensure the safety, as well as to ensure the safety of the plurality of cells are combined with the insulating structure can monitor the air condition (voltage, temperature) and the ventilation structure that can easily adjust the temperature of the battery The system has a connect port that can transmit battery status and information to the outside of the device, so that the user can easily configure the system and provide an integrated pack assembly up to an optional built-in protection circuit (BMS).

In order to achieve the above object, the battery pack of the present invention, the battery; A first frame formed to seat the battery and having fastening holes formed therein; A second frame coupled to the first frame to surround the edge of the battery; And a space maintaining part spaced apart from the neighboring battery packs so as to protrude from the first frame or the second frame to form a space through which air can pass.

Preferably, the gap holding portion is formed in the first frame, the gap holding groove is formed in a position corresponding to the gap holding portion in the first frame so that a portion of the gap holding portion is inserted into the gap holding groove of the neighboring first frame. Is made possible.

Preferably, the battery includes an electrode assembly in which a positive electrode plate, a separator, and a negative electrode plate are stacked, a pouch for enclosing and sealing the electrode assembly, and a positive electrode terminal and a negative electrode terminal respectively connected to the positive electrode plate and the negative electrode plate and protruding out of the pouch. Wherein, the pouch is sealed to the edge to seal the electrode assembly to form a sealing portion, the first frame and the second frame to fix the sealing portion interposed between the first frame and the second frame Combined.

According to the present invention, a first opening portion and a second opening portion are formed at the centers of the first frame and the second frame so that a part of the electrode assembly is exposed to the outside, and the first frame is formed at an edge of the electrode assembly. A first support surface in contact; A first pressing surface extending vertically from the first supporting surface; A first coupling surface extending to face the first supporting surface with respect to the first pressing surface, and having a plurality of coupling protrusions formed at predetermined intervals; And a pair of terminal installation surfaces in contact with the positive electrode terminal and the negative electrode terminal, respectively, wherein the second frame comprises: a second support surface in contact with an edge of the electrode assembly; A second pressing surface extending vertically from the second supporting surface; And a second engaging surface extending to face the second supporting surface with respect to the second pressing surface and having a plurality of defect grooves formed at positions corresponding to the engaging projections, wherein the engaging projections are fitted into the engaging grooves. Is coupled, the first pressing surface and the second pressing surface is made so as to press the sealing portion therebetween to secure the sealing portion.

Preferably, the upper part of the first frame is formed to be spaced apart from the connecting portion for electrically connecting the terminals of the neighboring battery and the partition for the insulation.

More preferably, guide walls are formed at both upper ends of each of the connection portion and the partition, and guide grooves are formed in each of the guide walls facing each other.

Preferably, the battery pack is made to have a different color according to the position of the polarity of the terminal formed in the battery.

According to another aspect of the present invention, a battery, the first frame is seated and the fastening hole is formed, a second frame installed in the first frame to surround the edge of the battery, and the first frame or the second frame A plurality of battery packs each having a spacing portion formed to protrude from; A first cover and a second cover disposed on an outer surface of the outermost battery pack of the plurality of battery packs and having coupling holes formed at positions corresponding to the fastening holes; A plurality of bus bars provided to connect with the positive electrode terminal and the negative electrode terminal formed in the battery, respectively; And a fastening member for fastening the plurality of battery packs and the first cover and the second cover at the same time, wherein each of the battery packs is spaced at a predetermined interval by the interval maintaining part to allow air to pass between the battery packs. Provided is a battery pack assembly having a space.

Preferably, the gap maintaining part is formed in the first frame, and the gap maintaining groove is formed at a position corresponding to the gap maintaining part in the first frame of the battery pack, so that a part of the gap maintaining part maintains the gap between the first frames. It is made to be inserted into the groove.

Preferably, the upper part of the first frame is formed to be spaced apart from the connecting portion for electrically connecting the terminals of the neighboring battery pack and the partition for the insulation.

More preferably, guide walls are formed at both upper ends of each of the connection portion and the partition, and guide grooves are formed at each of the opposing guide walls so that the barrier member for sliding the terminals of the battery packs exposed to the outside is slidably coupled to each other. do.

Preferably, the upper surface of the battery pack assembly is formed with a terminal protective cover for protecting the terminals of the battery pack.

According to the present invention, the fastening member may include: a rod bolt inserted into a coupling hole formed in the first cover and the second cover and a coupling hole formed in the plurality of battery packs; And a nut screwed with the rod bolt.

Preferably, any one of the first cover or the second cover is formed with a spacer protruding from the cover so as to be spaced apart from the battery pack, the air between the first cover and the second cover and the battery pack at a predetermined interval spaced A space through which is passed is formed.

According to the present invention, any one of the first cover or the second cover is equipped with a battery management system (BMS) module for diagnosing the performance of each battery by measuring the voltage and temperature of each battery, the BMS module is each battery It is connected with voltage wire and temperature sensor wire.

Preferably, the battery pack is made to have a different color to prevent the same polarity is connected even by identifying the position of the polarity according to the position of the polarity of the terminal formed in the battery.

The battery pack and the battery pack assembly having the same according to the present invention have the following effects.

First, the battery can be stably supported, as well as minimizing the increase in volume and facilitating the coupling of a plurality of batteries.

Second, it is possible to ensure safety by installing a partition to have an insulating structure. In addition, partitions can be selectively separated to connect a plurality of batteries in series or in parallel.

Third, it is easy to maintain the optimal operating temperature by blowing the hot air or cold air from the outside to control the optimum temperature of the battery by forming a vent through which air can pass between each battery, any one of the plurality of batteries Even if a spark or fire occurs in the battery, the possibility of spark or fire transmission to neighboring cells can be minimized.

Fourth, by forming an opening in the frame, the battery exposed through the opening can smoothly dissipate heat, as well as there is an effect that the battery is heated to the buffer when the volume is expanded.

Fifth, since the battery pack has two different colors according to the position of the polarity of the terminal formed in the battery, the position of the polarity can be easily identified, and the same polarity is connected to generate a short circuit. It is possible to prevent the mistake of the operator, as well as to improve the ease of assembly of the battery pack assembly.

The present invention will be described in detail with reference to the following drawings, but these drawings illustrate preferred embodiments of the present invention, and the technical concept of the present invention is not limited to the drawings and should not be interpreted.

1 is an exploded perspective view showing a battery pack according to a first embodiment of the present invention.

2 is an assembled perspective view of FIG. 1.

3 is a cross-sectional view taken along line III-III ′ of FIG. 2.

4 is a perspective view showing a battery pack according to a second preferred embodiment of the present invention.

5 is an exploded perspective view showing a battery pack assembly having a battery pack according to a first embodiment of the present invention.

6 is an assembled perspective view of FIG. 5.

Figure 7 is a view showing a state in which the vent hole is formed by the battery pack assembly according to the present invention.

8 is a perspective view showing a state in which the battery pack assembly according to the present invention is cut in the horizontal direction.

9 is a perspective view showing a state in which the battery pack assembly according to the invention is cut in the vertical direction.

10 is a view showing a state in which air is circulated to the vent formed in the battery pack assembly according to the present invention.

11 is a perspective view of another battery pack assembly according to a preferred embodiment of the present invention.

12 is a perspective view of a modification of the battery pack assembly shown in FIG. 11.

FIG. 13 is a perspective view illustrating a state in which a BMS cover and a terminal protective cover are coupled to FIG. 12; FIG.

14 is an exploded perspective view showing a battery pack assembly having a battery pack according to a second preferred embodiment of the present invention.

15 is an exploded perspective view of FIG. 13.

16 is an assembled perspective view of FIG. 14.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is an exploded perspective view illustrating a battery pack according to a first exemplary embodiment of the present invention, FIG. 2 is an assembled perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III ′ of FIG. 2.

1 to 3, the battery pack 100 includes a battery 10, a first frame 110 and a second frame 120 coupled to each other with the battery 10 interposed therebetween, and the first frame 110. The spacer 110 is provided to protrude from the frame 110 or the second frame 120.

The battery pack 100 according to the present invention may be used as a single product or a plurality of connected parts may be used as a product of an assembly. The battery pack assembly 200 to which the battery pack 100 is connected in plural will be described below.

The battery 10 is a secondary battery capable of charging and discharging, and includes an electrode assembly 20 in which a positive electrode plate, a separator, and a negative electrode plate are stacked, and the electrode assembly 20 to accommodate the electrode assembly 20 and an electrolyte (not shown). ) Is made up of a pouch 30 for sealing and a positive electrode terminal 21 and a negative electrode terminal 22 which are respectively connected to the positive electrode plate and the negative electrode plate and protrude out of the pouch 30. In this case, as the pouch 30 is fused at the edge of the electrode assembly 20, the sealing part 32 is formed. That is, the sealing part 32 is formed at four edges of the rectangular or square electrode assembly 20. Such a battery 10 is preferably a pouch type secondary battery.

Here, since the structure of the electrode assembly 20, the electrolyte, and the like are well known in the art, a detailed description thereof will be omitted.

A fastening hole 145 is formed in the first frame 110, and the battery 10 is seated on an inner surface thereof. At this time, the first frame 110 and the second frame 120 to be described later is formed to surround the edge of the battery 10 when combined. That is, a first opening 111 and a second opening 121 are formed at the centers of the first frame 110 and the second frame 120 to expose a portion of the electrode assembly 20 to the outside, respectively. . This is to smoothly discharge heat to the first opening 111 and the second opening 121 as heat is generated in the electrode assembly 20 when the battery 10 is used.

In addition, the first opening 111 and the second opening 121 serve as a buffer for the battery 10 when the battery 10 is heated to expand the volume.

According to the present invention, the first frame 110 extends vertically from the first support surface 112 and the first support surface 112 in contact with the edge of the electrode assembly 20 of the battery 10. The first pressing surface 113 and the first coupling surface extending to face the first support surface 112 on the basis of the first pressing surface 113 and having a plurality of coupling protrusions 115 at regular intervals ( 114 and a pair of terminal mounting surfaces 116 in contact with the positive electrode terminal 21 and the negative electrode terminal 22 of the battery 10, respectively.

In addition, the second frame 120 may include a second support surface 122 contacting the edge of the electrode assembly 20, a second pressing surface 123 vertically extending from the second support surface 122, and The second coupling surface extends to face the second support surface 122 with respect to the second pressing surface 123, and has a plurality of coupling grooves 125 formed at positions corresponding to the coupling protrusion 115. 124).

When the first frame 110 and the second frame 120 as described above, the coupling protrusion 115 is fitted into the coupling groove 125. In this case, although the coupling protrusion 115 is illustrated as being formed near both sides of the first frame 110, the present invention is not limited thereto and may be formed near the lower side of the first frame 110.

Here, as another alternative of the structure in which the first frame 110 and the second frame 120 are coupled, a coupling groove is formed in the first frame 110 and the coupling groove is formed in the second frame 120. Coupling protrusions are formed at corresponding positions and can be combined.

Meanwhile, when the first frame 110 and the second frame 120 are coupled to each other, as illustrated in FIG. 3, the first pressing surface 113 and the second pressing surface 123 are disposed between the sealing part 32. To pressurize. Therefore, the battery 10 interposed between the first frame 110 and the second frame 120 is more stably fixed. Therefore, in the conventional pouch-type battery, it is not necessary to fold, cut, or tape the sealing portion protruding from the electrode assembly, and to stably fix the battery as compared to the conventional art. In this case, the sum of the protruding length of the first pressing surface 113 and the protruding length of the second pressing surface 123 may be equal to the thickness of the battery 10.

In addition, the second coupling surface 124 is fitted between the coupling protrusion 115 and the first coupling surface 114. That is, the second frame 120 is fitted to the first frame 110. Therefore, even when the first frame 110 and the second frame 120 are coupled, the battery pack 100 has a thickness substantially equal to that of the first frame 110. Thus, even if the first frame 110 and the second frame 120 are combined, the battery pack 100 does not significantly increase its volume.

Meanwhile, the first support surface 112 and the second support surface 122 are formed to stably support the battery 10 by being in contact with the edge of the electrode assembly 20.

According to the present invention, the first frame 110 and the second frame 120, that is, the battery pack 100 is two different depending on the position of the polarity of the

terminals

21, 22 formed in the battery 10 Is made to have a color. For example, when the positive electrode terminal 21 is located on the left side and the negative electrode terminal 22 is located on the right side of the battery pack 100, the battery pack 100 is dark gray, and the terminal 21 is formed. When the polarities of the 22 are reversed, the battery pack 100 is light gray. The color of the battery pack 100 may be, for example, any color such as white and black, blue and red as long as the color can be distinguished from each other according to the position of the polarity of the terminal.

As described above, changing the color of the battery pack 100 according to the positions of the polarities of the

terminals

21 and 22 formed in the battery 10 may be easily identified by the same polarity and may be connected to a short circuit ( short) is prevented from occurring. That is, to prevent a mistake of an operator when connecting the plurality of battery packs 100.

The first frame 110 and the second frame 120 is made of a plastic having high electrical insulation. Thus, safety can be ensured.

In addition, the pouch 30 of the cell 10 is coated with aluminum, wherein the edge of the pouch 30 is cut, exposing the cut portions of aluminum. Accordingly, since the first frame 110 and the second frame 120 made of plastic surround the sealing portion 32 of the pouch 30 having aluminum exposed at the edge thereof, insulation breakdown may be prevented.

According to the present invention, a pair of terminal mounting surfaces 116 contacting the positive electrode terminal 21 and the negative electrode terminal 22 of the battery 10 are formed on the upper side of the first frame 110, respectively. As shown, the battery pack 100 further includes a pair of terminal plates 130 respectively installed at the positive electrode terminal 21 and the negative electrode terminal 22, and the positive and negative electrode terminals 21. ) 22 is installed on the terminal mounting surface 116 by the bolt (B) together with the terminal plate 130.

The terminal plate 130 is installed to easily and electrically connect the positive and

negative electrode terminals

21 and 22 of a battery of another neighboring battery pack and the bus bar (230 of FIG. 5) to be described later. As more specifically, each terminal plate 130 is composed of a vertical portion 131 and a horizontal portion 132 to have a '-' shape. The vertical portion 131 of the pair of terminal plates 130 is coupled to the positive and

negative electrode terminals

21 and 22 and the bolt B, and the horizontal portion 132 has a flat surface on each terminal 21 ( 22) is located on the upper side to be exposed to the outside. At this time, the terminal plate 130 is coupled to each of the

terminals

21 and 22 so that the pair of horizontal portions 132 face the opposite directions. The pair of horizontal portions 132 face in the opposite direction to interconnect the single plate packs 130 with the terminal plates 130 of neighboring battery packs 100 when assembling.

Meanwhile, the connection part 118 and the partition 119 are formed on the upper side of the first frame 110 at regular intervals. More specifically, one of the pair of terminal mounting surfaces 116 is formed on the upper side of the connecting portion 118 is installed, the horizontal portion 132 of the terminal plate 130 is seated, the other terminal mounting surface 116, a partition 119 is formed on the upper side to prevent contact with the terminals of the neighboring battery 10.

At this time, the partition 119 is formed to be selectively cut. For example, an incision line (not shown) is formed at both ends of the partition 119 so that the partition 119 is separated when a predetermined force is applied to the partition 119. The partition 119 may be selectively separated by connecting the plurality of battery packs 100 in series or in parallel.

For example, when a plurality of battery packs 100 are connected to form a battery pack assembly (see '200' in FIG. 5), when the battery packs 100 are connected in series, the battery packs 100 are insulated from neighboring battery packs 100. The partition 119 is maintained for the purpose, and when the battery pack 100 is connected in parallel, the partition 119 may be separated.

In addition, as the connection part 118 and the partition 119 are spaced apart from each other, a passage H having an open upper portion is formed between the connection part 118 and the partition 119. The passage H will be described below.

Meanwhile, the reference numeral '135', which is not described, is a base plate positioned between the positive and

negative electrode terminals

21 and 22 and the terminal installation surface 116 to improve the grounding force.

According to the present invention, the first frame 110 or the second frame 120 is formed with a spacing portion 140 protruding to have a predetermined length, the spacing portion 140 is a plurality of battery pack 100 ) Serves as a spacer to space the predetermined distance between each of the battery packs (100). As shown, the gap maintaining unit 140 is illustrated as being formed in the first frame 110, but is not limited thereto and may be formed in the second frame 120.

The gap maintaining part 140 is formed with a fastening hole (see '145' in FIG. 7) penetrated in the longitudinal direction thereof. The fastening hole 145 is formed to fasten the plurality of battery packs 100 by the fastening member (see '250' of FIG. 5) in the battery pack assembly 200 which will be described later. In this case, although the fastening hole 145 is illustrated as being formed in the gap maintaining part 140, the present invention is not limited thereto, and the gap maintaining part 140 and the fastening hole 145 may be formed in the first frame 110, respectively. have.

More specifically, referring to FIG. 7, the gap maintaining part 140 has a seating portion 141 having a predetermined length and a diameter smaller than that of the seating portion 141. The insertion portion protrudes from the seating portion 141. The protrusion 143 is provided.

At this time, the inner surface of the first frame 110 is formed with a spacing maintenance groove 117 to match the insertion protrusion 143 at a position corresponding to the spacing holding portion 140. This is to insert the insertion protrusion 143 into the space maintaining groove 117 of the neighboring first frame 110 so that the neighboring first frames 110 can be stably assembled. At this time, the outer diameter of the insertion protrusion 143 is made to be the same as the inner diameter of the gap maintenance groove 117, the seating portion 141 is not inserted into the gap maintenance groove 117. Therefore, a space is formed between neighboring battery packs 110 by the length of the seating portion 141. The space (see '260' of FIG. 6) serves as a vent through which air can pass.

In addition, as the space 260 is formed between the plurality of battery packs 100 by the gap maintaining unit 140, any one of the cells 10 of the plurality of battery packs 100 may spark in the battery 10. Alternatively, even if a fire occurs, it is possible to minimize the possibility of the spark or fire transfer to the neighboring battery pack 10.

On the other hand, the gap maintaining groove 117 is made to communicate with the fastening hole (145). This is because the fastening member 250 is inserted into the fastening hole 145 to communicate adjacent fastening holes 145 in a straight line.

In the present specification, the spacing maintaining part 140 is illustrated and described as being composed of a seating part 141 and an insertion protrusion 143, but is not limited thereto. That is, the interval maintaining part 140 is made of a cylindrical inserted into the gap maintaining groove 117, the length of the gap holding portion may be made to be formed longer than the length of the gap holding groove.

As such, the gap maintaining unit 140 in which the fastening holes 145 are formed is illustrated as being formed at each corner portion of the first frame 110, but is not limited thereto. The plurality of battery packs 100 may be fastened at one time. And, if the battery pack 100 can be spaced apart by a predetermined interval may be employed even if formed in any position. In addition, as described above, the interval maintaining unit 140 may be formed in the second frame 120 to be spaced apart from the neighboring battery pack 100 by a predetermined interval.

4 is an assembled perspective view of a battery pack according to a second preferred embodiment of the present invention. Here, the same reference numerals as in the above-described drawings indicate the same members.

The battery pack 100 ′ according to the present embodiment includes a battery 10, a first frame 110 ′ and a second frame 120 coupled to each other with the battery 10 interposed therebetween, and the first frame ( And a space maintaining part 140 protruding from the 110 '.

That is, the battery pack according to the present embodiment has the same structure as the embodiment described with reference to FIGS. 1 to 3, and only the guide wall 152 and the handle ('268' in FIG. 14) are connected to the first frame 110 ′. The auxiliary means for installing () is further added.

The guide wall 152 is formed at both upper ends of each of the connecting portion 118 and the partition 119. That is, a pair of guide walls 152 are formed in the connecting portion 118 and the partition 119, respectively. In this case, it is preferable that the upper end of the guide wall 152 and the upper end of the partition 119 are located on the same line in the partition 119 protruding upward from the connecting part 118, and thus the guide wall formed in the connecting part 118. 152 is preferably formed extending upward.

In the guide wall 152, guide grooves 151 are formed in portions facing each other. More specifically, as shown, guide grooves 151 are formed on the surfaces of the guide walls 152 facing each other. That is, the surfaces of the pair of guide walls 152 formed in the connecting portion 118 and the surfaces of the pair of guide walls 152 formed in the partition 119, and the surfaces of the pair of guide walls 152 facing each other, Guide grooves 151 are formed in the guide walls facing each other between the partitions 119. That is, three pairs of guide grooves 151 are formed.

Here, the blocking groove member (see '267' of FIG. 14) to be described later is installed in the guide groove 151 facing each other.

Meanwhile, bolt holes 155 are formed at both sides of the upper end of the first frame 110 ′. The bolt hole 155 is an auxiliary means for fixing both sides of the handle (see '268' of Figure 14) by using a bolt to the battery pack assembly when assembling the plurality of battery pack (100 ').

Next, the battery pack assembly 200 in which a plurality of battery packs 100 having the above structure are connected will be described.

5 is an exploded perspective view illustrating a battery pack assembly having a battery pack according to a first exemplary embodiment of the present invention, FIG. 6 is an assembled perspective view of FIG. 5, and FIG. 7 is an interval maintaining part when assembling a plurality of battery packs. Is a view showing a state in which the battery pack is assembled to be spaced apart by a predetermined interval.

5 to 7, the battery pack assembly 200 includes a plurality of bus bars connected to the plurality of battery packs 100, the positive electrode terminal 21, and the negative electrode terminal 22 of the battery, respectively. 230, a first cover 210 and a second cover 220 disposed on an outer surface of the outermost battery pack 100 of the plurality of battery packs 100, and the battery pack 100 and the first cover 210. And a fastening member 250 that simultaneously fastens the

second covers

210 and 220.

Hereinafter, a structure in which a space 260 through which air can pass is formed between the battery packs 100 by connecting a plurality of battery packs 100 will be described.

As described above, the interval maintaining part 140 is formed in the first frame 110. At this time, the interval maintaining unit 140 should be formed to protrude toward the battery pack 100 to be connected. Thus, a gap maintaining groove 117 is formed at a position corresponding to the gap maintaining part 140 on a surface opposite to one surface of the first frame 110 on which the gap maintaining part 140 is formed. Therefore, the gap maintaining part 140 is partially inserted into the gap maintaining groove 117 formed in the neighboring first frame 110. That is, the insertion protrusion 143 of the gap maintaining unit 140 is inserted into the gap maintaining groove 117. At this time, the seating portion 141 is made to have a larger diameter than the gap maintaining groove 117 is not inserted into the gap maintaining groove 117. Accordingly, a space 260 spaced apart by the length of the seating portion 141 is formed between the battery pack 100 and the battery pack 100. The space 260 serves to reduce the possibility of air passing through the air vent and the possibility of fire transmission with a neighboring battery pack.

As a result, since the battery pack 100 is spaced apart by a predetermined distance by the gap maintaining unit 140 as a spacer, the battery 10 of the battery pack 100 may be advantageous in heat dissipation and cooling. When a fire occurs, the possibility of fire transmission to the neighboring battery 10 is lowered.

On the other hand, in assembling the battery pack 100 as described above, the battery pack 100 is made to have different colors according to the position of the polarity of the battery 10 formed in the battery pack 100, the same polarity is connected to each other The operator's mistake can be prevented. Thus, by connecting the battery pack 100 having two different colors in sequence it is possible to improve the ease of assembly of the battery pack assembly 200.

In addition, in the present specification, the partition 119 formed on the upper side of the battery pack 100 is illustrated as being assembled and arranged to be alternately located with the partition 119 of the neighboring battery pack 100, but as described above, The plurality of battery packs 100 are connected in series. Thus, when assembling the plurality of battery packs 100 to have a parallel structure, after removing the partitions 119 formed in each battery pack 100, the battery pack 100 may be arranged to have the same direction and connected.

The first cover 210 and the second cover 220 are respectively installed in the battery pack 100 located at the outermost portions of the plurality of battery packs 100. The first and

second covers

210 and 220 serve to protect the electrode assembly 20 exposed by the first or

second openings

111 and 121 of the battery pack 100 located at the outermost side. In addition, a space 260 through which air can pass is formed between the battery pack 100 and the battery pack 100.

More specifically, the structure of the first cover 210 and the second cover 220 is different depending on the front side or the rear side of the plurality of battery packs 100. Here, it should be understood that the front side represents the direction in which the second frame 120 is formed, and the rear side represents the direction in which the first frame 110 is formed.

For example, when the first cover 210 is installed at the front side of the battery pack 100, a spacer 214 is formed on the first cover 210. The spacer 214 has the same shape and the same structure as the space maintaining part 140 formed in the first frame 110 described above. Accordingly, the spacer 214 formed on the first cover 210 is inserted into the gap maintaining groove 117 formed on the inner surface of the first frame 110 so that the space between the first cover 210 and the battery pack 100 can be improved. Spaced apart. That is, a space 260 through which air can pass is formed.

In addition, when the second cover 220 is installed on the rear side of the battery pack 100, the coupling hole 227 into which the gap maintaining part 140 of the first frame 110 is inserted into the second cover 220. ) Is formed. The coupling hole 227 has the same shape and the same structure as the space maintaining groove 117 formed in the first frame 110 described above. Therefore, a space 260 is formed between the second cover 220 and the battery pack 100 to allow air to pass therethrough.

As described above, even if the first and

second covers

210 and 220 are installed at the outermost portions of the plurality of battery packs 100, the air may be circulated as a whole.

That is, as shown in FIGS. 8 to 10, a space 260 through which air can pass is formed between each battery pack 100 and between the battery pack 100 and the

covers

210 and 220. do. The space 260 is formed in both sides and the vertical direction of the battery pack assembly 200. Therefore, air can easily pass and circulate on both sides, the top surface and the bottom surface of the battery pack assembly 200.

In this case, the battery pack assembly 200 illustrated in FIG. 10 is a cross-sectional view of an electrode assembly in which air is introduced from one side and exposed to the first and

second openings

111 and 121 formed in the battery pack 100. 20) it can be seen to exit to the other side. Thus, it is possible to easily lower the temperature of the battery pack assembly 200 to maintain the proper use temperature. Thus, the use performance of the battery 10 is improved.

The fastening member 250 is inserted into the coupling hole 227 formed in the first cover 210 and the second cover 220 and the fastening hole 145 formed in the plurality of battery packs 100 to be connected to the first cover 210. ), The second cover 220 and the plurality of battery packs 100 are fastened. The fastening member 250 is formed of, for example, a rod bolt 255 and a nut 256 having a predetermined length.

A thread is formed on the outer circumferential surface near the end of the rod bolt 255 and screwed with the nut 256. In this case, the length of the bar bolt 255 is to be understood to be a length corresponding to the length of the sum of the thickness of the battery pack 100 and the thickness of the first cover 210 and the second cover 220 to be assembled.

One completed battery pack assembly 200 is manufactured by fastening the first cover 210, the second cover 220, and the plurality of battery packs 100 by using the fastening member 250.

According to the present invention, a PCB substrate 240 electrically connected to each bus bar 230 is further installed on the battery pack assembly 200. In this case, the bus bar 230 is formed by extending a horizontal contact surface 234 protruding upward to facilitate contact with the PCB substrate 240.

The PCB substrate 240 is installed on the upper side of the battery pack assembly 200 and serves to protect the

terminals

21 and 22 of the battery 10 from the outside. In addition, a connection electrode (not shown) is formed on a lower surface of the PCB substrate 240. The connection electrode protrudes to a predetermined thickness at a position corresponding to each electrode terminal such that the PCB substrate 240 is in close surface contact with the positive and

negative electrode terminals

21 and 22 when the PCB substrate 240 is coupled to the battery pack assembly 200. Is formed. In this case, the positive and

negative electrode terminals

21 and 22 are coupled to the terminal plate 130, and the terminal plate 130 is connected to the bus bar 230, so that the connecting electrode is connected to the bus bar 230. It should be understood that each is in contact. That is, the connection electrode is in surface contact with the horizontal contact surface 232 formed upwardly extending from the bus bar 230 electrically connected to the positive and

negative electrode terminals

21 and 22.

The PCB substrate 240 serves to protect each terminal 21 and 22 of the battery 10, and serves as a medium for measuring the voltage of each battery 10.

Meanwhile, a connector for connecting an external device (not shown) or a battery management system (BMS) module (not shown) using the battery pack assembly 200 according to the present embodiment may be formed on an upper surface of the PCB board 240. 245 is formed. Here, the BMS module is a device used to measure the state of use of the battery to predict the replacement time of the battery or to find, repair and replace the battery having a problem.

That is, the PCB board 240 serves as a medium for connecting each device 10 with an external device or BMS module through the connector 245. For example, a voltage wire (not shown) and a temperature sensor wire (not shown) are connected to each battery, and the PCB substrate 240 serves to connect the wires and the BMS module.

Meanwhile, as described above, the voltage wire and the temperature sensor wire are arranged through a passage (see 'H' in FIG. 4) formed between the connection part 118 and the partition 119 to be connected to the PCB substrate 240. As the PCB substrate 240 is installed on the upper side of the battery pack assembly 200, the copper wire to which each wire is connected is minimized. Therefore, the length of the wires is prevented from being lengthened to prevent the wiring from being complicated, thereby minimizing the probability of error occurrence.

The battery pack assembly 200 as described above may be assembled by increasing or decreasing the length of the bar bolt 255 of the fastening member 250 according to the number of battery packs 100 to be connected. For example, a battery pack assembly that increases the number of battery packs 100 shown in FIG. 5 is shown in FIG. 11. In this case, the battery pack assembly 300 illustrated in FIG. 11 differs from the battery pack assembly 200 illustrated in FIGS. 5 and 6 only in the number of battery packs 100, but the battery pack assembly 200 described above. As it is made of the same structure as the detailed description will be omitted.

At this time, the battery pack assembly 300 illustrated in FIG. 11 is illustrated as being divided into two PCB substrates 240, but the PCB substrate 240 has one length having a length corresponding to that of the battery pack assembly 300. It is obvious that the PCB substrate can be installed.

FIG. 12 is a perspective view of a modified example of the battery pack assembly illustrated in FIG. 11. Referring to FIG. 12 compared to FIG. 11, it can be seen that the shape of the PCB substrate 240 is deformed. Unlike the embodiment shown in FIG. 11, in the modification of the battery pack assembly of FIG. 12, since the PCB substrate 240 is in direct contact with the busbar 230, the busbar 230 may be configured to contact the horizontal contact surface 234. I don't need it. This can be clearly seen when comparing FIG. 5 and FIG. 12.

FIG. 13 is a perspective view illustrating a state in which a BMS cover 262 and a terminal protective cover 269 are coupled to FIG. 12, and a BMS module (not shown) is installed below the BMS cover 262, and a BMS cover 262 is provided. ) Is detachably installed on the terminal protective cover 269. Here, the terminal protection cover 269 prevents a short circuit due to inflow of moisture or the like into the battery pack assembly, and protects the terminals of the battery packs by covering the terminals of the battery packs.

Meanwhile, according to the present invention, the battery pack assembly is controlled to monitor the state of use of the battery so that it can be maintained or used under optimum conditions. For example, as shown in FIGS. 14 and 15, battery pack assemblies 200 ′, 300 ′ further include a Battery Management System (BMS) module 261. In this case, although the battery pack 100 ′ shown in FIGS. 14 and 15 is illustrated as using the battery pack 100 ′ according to the second embodiment, the battery pack 100 ′ according to the first embodiment may be used. It's okay.

As shown in FIG. 14, the battery pack assembly 200 ′ is disposed on an outer surface of a plurality of battery packs 100 ′ and an outermost battery pack 100 ′ of the plurality of battery packs 100 ′. The first cover 210 ′ and the second cover 220, the BMS module 261 installed on any one of the first cover 210 ′ and the second cover 220, and the battery pack 100 ′. And a fastening member 250 for fastening the first and second covers 210 'and 220 simultaneously. In this case, the battery pack assembly 200 ′ the same reference numerals as the battery pack assembly 200 described above indicate the same member.

That is, the battery pack assembly 200 ′ according to the present embodiment has the same structure as the embodiment described with reference to FIGS. 5 to 10, and only includes the BMS module 261 and is formed in the first frame 110 ′. An additional means for installing the guide wall 152 and the handle 268 is adopted.

Referring to the drawings, an accommodating part 212 for installing the BMS module 261 is formed in the first cover 210 ', and a BMS cover 262 for selectively opening and closing the accommodating part 212 is installed. do. Here, the BMS module 261 is a device used to measure the state of use of the battery to predict the replacement time of the battery or to find, repair and replace the battery having a problem.

The BMS module 261 determines the abnormality of the battery 10 by measuring the voltage and temperature of each battery 10, which is a voltage wire 263 for measuring the voltage and temperature in each battery 10 ) And the temperature sensor wire 264 are respectively connected to the BMS module 261. At this time, the temperature sensor wire 264 is preferably connected to a temperature sensor (not shown) for measuring the temperature of each battery (10).

The voltage wire 263 and the temperature sensor wire 264 are arranged through the passage (H) formed between the connecting portion 118 and the partition 119 as described above. The passage H serves as a passage for pulling the

wires

263 and 264 forward or backward. That is, the wire bundles formed by gathering each of the

wires

263 and 264 are connected to the BMS module 261 installed in the first cover 210 'on the front side along the passage H.

As such, the BMS module 261 prevents safety accidents such as ignition and explosion of the battery 10 due to the overcharging or overdischarging of the battery 10 or the temperature rise due to the use of the battery 10, as well as the battery 10. It is possible to maintain the optimal use state.

Meanwhile, reference numeral '265', which is not described, is a jump board connected to the BMS module 261 by a connector, and '266' is an In put / Out put port connected to an external device.

Additionally, as described above, the guide wall 152 is formed in the first frame 110 ′. A guide groove 151 is formed in the guide wall 152, and a blocking member 267 is slid in the guide groove 151. The blocking layer member 267 is to protect the

terminals

21 and 22 and the

wires

263 and 264 of the battery 10 exposed from the outside on the battery pack assembly 200 ′. Accordingly, the guide grooves 151 are arranged in a straight line when connecting the battery packs 100 '. Therefore, the blocking film member 267 is slid into the guide groove 151 and installed. At this time, the barrier member 267 inserted into both sides of the passage H, that is, the pair of guide grooves 151 formed in the partition 119 and the pair of guide grooves 151 formed in the connecting portion 118 is partitioned. 119 is divided into a plurality of sliding parts on the basis of the formed portion.

Meanwhile, bolt holes 155 formed at both upper ends of the first frame 110 'are arranged in a straight line as the battery pack 100' is connected. Accordingly, the handle 268 is positioned on the upper end of the bolt hole 155 formed in the first frame 110 ′ to fix the handle 268 using the bolt. That is, as the bolt hole 155 is formed to be spaced apart in a straight line, the handle 268 can be easily installed even if the length of the handle 268 is increased or decreased.

FIG. 15 is an exploded perspective view of FIG. 13, the biggest difference from FIG. 14 being that the BMS module 261 is not installed on the first cover 210 provided at the front of the battery pack assembly, and the top surface of the battery pack assembly is shown. Is installed on. When the BMS module 261 is disposed in this way, the connector formed on the PCB substrate 240 may be directly connected to the BMS module 261, thereby simplifying the wiring. Meanwhile, in FIG. 15, the fastening member 250 has a shape different from that described so far, but the fastening member 250 is not necessarily a structure in which the bar bolt 255 and the nut 256 are coupled to each other. As shown in the figure, the hollow shaft and the bolt may be combined.

As a result, the battery pack and the battery pack assembly according to the present invention is not only stably supports the battery, but also has an insulating structure and a ventilation structure through which air can pass, so that the battery pack and the battery pack assembly can be safely used at optimum use performance. That is, the battery pack and the battery pack assembly can be used as one power module for powering an electric vehicle.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims

battery;

A first frame formed to seat the battery and having fastening holes formed therein;

A second frame coupled to the first frame to surround the edge of the battery; And

And a spacing maintaining part spaced apart from a neighboring battery pack so as to protrude from the first frame or the second frame to form a space through which air can pass.
The method of claim 1,

The gap maintaining part is formed in the first frame,

The first frame is a battery pack, characterized in that the gap holding groove is formed in a position corresponding to the gap holding portion so that a portion of the gap holding portion is inserted into the gap holding groove of the neighboring first frame.
The method of claim 1,

The battery includes an electrode assembly in which a positive electrode plate, a separator, and a negative electrode plate are stacked, a pouch for enclosing and sealing the electrode assembly, and a positive electrode terminal and a negative electrode terminal connected to the positive electrode plate and the negative electrode plate respectively to protrude out of the pouch,

The pouch is sealed at the edge to seal the electrode assembly to form a sealing portion,

And the first frame and the second frame are coupled to fix the sealing part interposed between the first frame and the second frame.
The method of claim 3,

First and second openings are formed at the centers of the first frame and the second frame to expose a part of the electrode assembly to the outside, respectively.

The first frame,

A first support surface in contact with an edge of the electrode assembly;

A first pressing surface extending vertically from the first supporting surface;

A first coupling surface extending to face the first supporting surface with respect to the first pressing surface, and having a plurality of coupling protrusions formed at predetermined intervals; And

And a pair of terminal installation surfaces in contact with the positive electrode terminal and the negative electrode terminal, respectively.

The second frame,

A second support surface in contact with an edge of the electrode assembly;

A second pressing surface extending vertically from the second supporting surface; And

A second engaging surface extending to face the second supporting surface with respect to the second pressing surface, and having a plurality of defect grooves formed at a position corresponding to the engaging projection;

The coupling protrusion is fitted into the coupling groove, the battery pack, characterized in that the first pressing surface and the second pressing surface is made to press the sealing portion between the fixing portion to secure the sealing portion.
The method of claim 1,

The battery pack, characterized in that formed on the upper side of the first frame spaced apart from the connecting portion for electrically connecting the terminals of the neighboring battery and the partition for the insulation.
The method of claim 5,

Guide walls are formed at both upper ends of the connection portion and the partition,

And a guide groove formed in each of the guide walls facing each other.
The method of claim 1,

The battery pack is characterized in that the battery pack is made to have a different color according to the position of the polarity of the terminal formed in the battery.
A battery, a first frame in which the battery is seated and a fastening hole is formed, a second frame installed in the first frame to surround the edge of the battery, and a gap maintaining part protruding from the first frame or the second frame, respectively. A plurality of battery packs;

A first cover and a second cover disposed on an outer surface of the outermost battery pack of the plurality of battery packs and having coupling holes formed at positions corresponding to the fastening holes;

A plurality of bus bars provided to connect with the positive electrode terminal and the negative electrode terminal formed in the battery, respectively; And

And a fastening member for fastening the plurality of battery packs, the first cover, and the second cover at the same time.

Each battery pack is spaced apart by a predetermined interval spaced apart by the battery pack assembly, characterized in that a space for allowing air to pass between each battery pack is formed.
The method of claim 8,

The gap maintaining part is formed in the first frame,

Battery pack assembly, characterized in that the first frame of the battery pack is formed in the interval maintaining groove corresponding to the interval holding portion is inserted into the interval holding groove of the neighboring first frame.
The method of claim 8,

The battery includes an electrode assembly in which a positive electrode plate, a separator, and a negative electrode plate are stacked, a pouch for enclosing and sealing the electrode assembly, and a positive electrode terminal and a negative electrode terminal connected to the positive electrode plate and the negative electrode plate respectively to protrude out of the pouch,

The pouch is sealed at the edge to seal the electrode assembly to form a sealing portion,

The first frame and the second frame is coupled to the battery pack assembly, characterized in that coupled to secure the sealing portion interposed between the first frame and the second frame.
The method of claim 8,

The battery pack assembly, characterized in that the upper portion of the first frame is spaced apart from the connection for electrically connecting the terminals of the neighboring battery pack and the partition for the insulation.
The method of claim 11,

Guide walls are formed at both upper ends of the connection portion and the partition,

And a guide groove formed on each of the guide walls facing each other so that the barrier member for sliding the terminals of the battery packs exposed to the outside is slidably coupled to each other.
The method of claim 8,

The battery pack assembly, characterized in that the upper surface of the battery pack assembly is formed with a terminal protective cover for protecting the terminals of the battery pack.
The method according to any one of claims 8 to 13,

The fastening member,

Rod bolts inserted into coupling holes formed in the first cover and the second cover and coupling holes formed in the plurality of battery packs; And

And a nut screwed to the rod bolt.
The method according to any one of claims 8 to 13,

Any one of the first cover or the second cover is formed with a spacer protruding from the cover to be spaced apart from the battery pack by a predetermined distance,

The battery pack assembly, characterized in that the space between the first cover and the second cover and the battery pack spaced apart by a predetermined space is formed through which air can pass.
The method of claim 15,

Any one of the first cover or the second cover is equipped with a battery management system (BMS) module for diagnosing the performance of each battery by measuring the voltage and temperature of each battery,

The BMS module is a battery pack assembly, characterized in that connected to the voltage wire and the voltage wire and the sensor connected to each battery.
The method according to any one of claims 8 to 13,

The battery pack assembly is characterized in that the battery pack assembly is made to have a different color to prevent the same polarity is connected even by identifying the position of the polarity according to the position of the polarity of the terminal formed in the cell.