TW201324925A - Battery assembly - Google Patents

Abstract

The invention provides a battery assembly, which includes: at least two separate sets of first and second battery module, each battery module including at least two batteries, each battery has the positive electrode and the negative electrode; Conductive parts, including three parts: the first part is the two positive electrode in the first cell module of parallel, the second part is the two negative electrode in the second cell module of parallel, and the third part is formed of a positive electrode in the first cell module of series connection and a negative electrode in the second cell module. Compared with the existing technology, the invention of beneficial effect is: The parallel and series connection of several batteries can be achieved through this incorporated conductor. Meanwhile, the connective part of the conductor is tabular which makes the conductor withstand larger electric current. Moreover, the connector can set many tabular connective parts to promote its ability of standing electric current.

Description

Battery pack

The present invention relates to a battery assembly, and more particularly to a conductive member of a battery assembly.

In recent years, considering the increasing environmental pollution, batteries, which can be charged or discharged, are often used as power sources to replace traditional fossil fuels to solve the environmental pollution problems caused by fossil fuels. In the field of vehicle power, compared with traditional energy sources, electric power sources have obvious advantages in environmental protection. The use of batteries as a power source does not consume gasoline, no exhaust gas, low noise, and low radiation, which is an ideal power source. At present, commonly used electric power sources usually use a plurality of single cells to be placed in a battery module frame, and then the battery cells are electrically combined through a series-parallel module to form a battery module, thereby meeting the power demand.

At present, each battery in the same module is usually connected by a point-to-point connection. This connection method is not suitable for the connection between multiple batteries. This is because the charging and discharging current between multiple batteries is large, and the common connecting wires may be due to Can not carry too much overcurrent and is blown.

In view of this, it is necessary to improve the existing conductive connectors to solve the above problems.

The technical problem to be solved by the present invention is to provide a battery assembly in which the conductive member can withstand a large overcurrent.

In order to solve the above technical problem, the present invention adopts the following technical solution: a battery assembly, the battery assembly includes: at least two separate first and second battery modules, each battery module including at least two batteries, each The battery has a positive electrode and a negative electrode; the conductive member includes a first portion of the two positive electrodes of at least two batteries connected in parallel with the first battery module, and a second electrode of the at least two batteries of the parallel second battery module The second part, and the third electrode of the negative electrode of one battery of the first battery module and the third electrode of the second battery module, the third part is flat.

As a further improvement of the present invention, the conductive member further includes a fourth electrode of the positive electrode of the other battery of the first battery module and the negative electrode of the other battery of the second battery module.

As a further improvement of the invention, the aforementioned first portion is parallel to the second portion.

As a further improvement of the present invention, the aforementioned third portion is perpendicular to the aforementioned first portion and second portion.

As a further improvement of the present invention, the aforementioned fourth portion is parallel to the third portion and perpendicular to the aforementioned first portion and second portion.

As a further improvement of the present invention, the conductive member is provided with a through hole through which the positive and negative electrodes of the battery pass.

As a further improvement of the present invention, the third portion of the conductive member is provided with a buffer strip between adjacent through holes.

As a further improvement of the present invention, the first portion and/or the second portion of the conductive member are provided with a buffer strip between adjacent through holes.

As a further improvement of the present invention, the aforementioned buffer belt is arched.

As a further improvement of the present invention, the battery module includes a top bracket, and the top bracket covers the battery and is provided with an opening for the battery electrode to pass through, and the conductive member is disposed on the top bracket.

Compared with the prior art, the invention has the beneficial effects that the series and/or parallel connection between the plurality of batteries can be realized by an integrally formed conductive member, and the connecting portion of the conductive member is flat, so that the conductive member can be made. Can withstand large overcurrents. Further, the flat connection portion may be provided in plurality, thereby enhancing the overcurrent capability of the conductive member.

The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, the embodiments are not intended to limit the invention, and the structures, methods, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

As shown in the first figure, in one embodiment of the battery assembly 100 of the present invention, the battery module frame (not shown) includes a bracket mechanism. The bracket mechanism is for fixing the battery case, and the bracket mechanism includes at least a top bracket 11 and a bottom bracket 12 opposite to the top bracket 11. In other embodiments, the bracket mechanism can also include a side bracket between the top bracket 11 and the bottom bracket 12. The side bracket is also used to hold the battery case, but the clamping direction is perpendicular to the direction in which the top and bottom brackets are clamped. In this embodiment, the bracket mechanism includes only the top bracket 11 and the bottom bracket 12, and the top bracket 11 and the bottom bracket 12 sandwich the battery casing up and down. The battery module frame (not shown) further includes an insulating cover 14 that is secured over the top bracket such that the electrodes projecting beyond the top bracket 11 are covered, thereby reducing the likelihood of a battery causing a short circuit.

As shown in the second, third and fourth figures, the top bracket 11 is provided as a part of the bracket mechanism, which is disposed on the upper portion of the battery case 13 and below the insulating cover 14. Since it is used inside the battery pack, the top bracket 11 needs to have good insulation, fire resistance, and high temperature resistance. In this embodiment, the top bracket 11 is made of ABS plastic material to have a fire rating of 90.

The bracket mechanism defines at least two single-cell receiving areas between the bottom bracket 12 and the top bracket 11, and a partitioning plate 123 is further disposed between each of the single-cell receiving areas. In the embodiment as shown in the second and third figures, 16 top cell storage areas 114 are provided in the top bracket 11, and the bottom stand 12 is provided with 16 bottom cell storage areas 121, and correspondingly up and down, thereby ensuring The storage battery structure is stable.

Separating plates 115, 123 are also provided on the top bracket 11 and the bottom bracket 12, respectively, to divide the cell receiving area. The partition plate is arranged to ensure a gap between the individual cells. Since the battery is prone to generate heat during the working process, causing the battery to expand, if the batteries are closely attached, the batteries will be squeezed each other, thereby affecting the quality of the battery, so it is important to reserve a gap between the individual cells. . In addition, the gaps generated by the partition plates 123, 115 can effectively dissipate the heat generated during the use of the battery, thereby reducing the internal temperature of the battery assembly to prolong the service life.

The shape of the battery held by the bracket mechanism provided by the present invention may be any suitable shape, and only the shape of the single battery receiving area needs to be defined on the bracket mechanism. In this embodiment, the top bracket 11 is provided with a square battery receiving area 114 to accommodate the square battery. At the same time, the bottom bracket 12 is also correspondingly provided with the square battery receiving area 121 to match the top bracket 11, thereby ensuring the stability of the entire bracket mechanism. The bottom bracket 12 needs to have a closed bottom wall to prevent the bottom of the adjacent battery casing from being conducted through the bottom wall.

In the embodiment, the bracket mechanism is provided with a glass glue or a double-sided tape for fixing the battery case in the battery receiving areas 114 and 121 of the top bracket 11 and the bottom bracket 12, and the double-sided tape needs to have a certain thickness so as to be bonded. More secure, the bracket mechanism is thus more securely clamped to the battery housing 13.

As shown in the second and fourth figures, after the top bracket 11 and the bottom bracket 12 are used as the bracket mechanism to fix the battery case 13, a battery pack is formed. The battery pack is built into the battery module housing. In order to ensure that the battery module frame is stable in the battery module housing, and is not loosened due to bumps and vibrations, a plurality of first gaps 113 and second gaps are disposed on the side edges of the bottom bracket 12 and the top bracket 11 at a plurality of intervals. 122. Corresponding ribs are arranged on the inner side of the corresponding battery module box, so that the guiding and positioning functions can be performed, so that the battery module frame (not shown) is placed in the battery module box, and the process is simple and the position is stable.

As shown in the second and fifth figures, the top bracket 11 is fixedly connected to the insulating cover 14, and the top bracket 11 is provided with a receiving recess 111 for receiving the battery housing after the top bracket 11 covers the battery housing 13. 13 upper electrode passed. The single battery case 13 passes through the two receiving notches 111 for the positive and negative electrodes to pass through, respectively. In other embodiments, only one receiving recess 111 may be provided in the top bracket 11 for each battery housing 13 while the positive and negative electrodes on the battery housing 13 pass through.

After the positive and negative electrodes pass through the top bracket 11, they can be electrically connected to the positive and negative electrodes on the other battery casings 13 through conductive members (which will be described later) to form a battery module. The insulating cover 14 is disposed above the top bracket 11 to ensure that the series and parallel lines of the electrodes on the battery case 13 are not affected, resulting in short-circuit or open circuit of the series and parallel lines. The insulating cover 14 and the top bracket 11 can be fixed by screws. In this embodiment, the top bracket 11 is provided with a screw post 112. The insulating cover 14 is provided with a screw hole 141 corresponding to the position. The insulating cover 14 is fixed to the screw post by a self-tapping screw, so that the insulating cover 14 is fixedly connected with the top bracket 11.

In the embodiment shown in FIG. 5, the insulating cover 14 includes a top wall 142 and side walls 143 extending downward from the peripheral side of the top wall 142. A plurality of openings are provided in the side walls. The side wall 143 abuts against the top bracket 11 after the insulating cover 14 is screwed to the top bracket 11, so that the opening forms a plurality of passages 144 between the insulating cover 14 and the top bracket 11 to facilitate connection of the batteries.

Referring to the embodiments shown in FIG. 6 and FIG. 9 , the battery assembly includes a battery, and the battery includes: a battery case 13; a battery core cover, the battery core cover is disposed at the top of the battery case 13; and the positive electrode 131 a negative electrode 132 protruding from the battery core cover; a nut 133 disposed on the positive electrode 131 and the negative electrode 132 for holding the conductive member 20 on the positive electrode 131 and the negative electrode 132 and maintaining the two Electrically connected; and a battery module, such as the battery module frame (not shown) of the foregoing invention. At the same time, the battery case 13 is provided with a positive electrode material and a negative electrode material. In this embodiment, the positive electrode material includes lithium iron phosphate (LiFePO4).

In summary, the battery assembly can be assembled as follows:

1. Put the plurality of battery casings 13 into the bottom bracket and connect them by means of glass glue (you can also use double-sided tape);

2. Place the top bracket above the plurality of batteries and connect them with glass glue (you can also use double-sided tape);

3. The series and parallel connection are realized between the batteries through the conductive members;

4. Place the insulating cover on the top bracket and fix it. The fixing method can be locked by self-tapping screws.

According to the above assembly method, the battery case 13 can be effectively fixed, and the assembly is simple and the production efficiency is high.

Another embodiment of the battery assembly shown in Figures 7 and 9 is shown. The battery assembly includes: at least two first and second battery modules disposed separately, each battery module including at least two batteries, each battery having a positive electrode and a negative electrode; a conductive member 20, and the conductive member 20 includes a parallel connection a first portion 21 of two positive electrodes of at least two batteries of a battery module, a second portion 22 of two negative electrodes of at least two batteries connected in parallel with the second battery module, and one of the first battery modules in series The third electrode 23 of the negative electrode of the battery and the negative electrode of the battery of the second battery module, the third portion is flat.

The third portion 23 can effectively connect the positive electrode on a part of the battery in the first battery module and the negative electrode on a part of the battery in the second module, so that the first and second modules are connected in series. In this embodiment, the conductive member 20 is disposed above the top bracket 11 for connecting electrodes of different batteries to realize series and parallel connection between different batteries.

The conductive member 20 further includes a fourth electrode 24 that connects the positive electrode of the other battery of the first battery module and the negative electrode of the other battery of the second battery module. The first portion 21 of the conductive member 20 is arranged in parallel with the second portion 22, and the third portion 23 is perpendicular to the first portion 21 and the second portion 22. Similarly, the fourth portion 24 is parallel to the third portion 23 and perpendicular to the first portion 21 and the second portion 22.

The conductive member 20 may be made of a conductive metal. In this embodiment, it is preferably made of a material mainly made of copper or brass, and the conductive member 20 is formed in the form of a copper sheet. The first portion 21 and the second portion 22 of the conductive member 20 are in the form of long straight copper sheets, and the third connecting member 23 and the fourth connecting member 24 are short straight copper sheets, and the first portion 21 and the second portion 22 are simultaneously connection. In this embodiment, the first portion 21, the second portion 22, the third portion 23, and the fourth portion 24 of the conductive member are integrally formed by stamping. The third portion 23 and the fourth portion 24 are both used to connect two adjacent battery packs in series. In other embodiments, only one of them may be provided. In the present embodiment, two are provided to ensure that the conductive member 20 has a large overcurrent capability.

The conductive member 20 is provided with a through hole 211 for the electrode on the battery case 13 to pass therethrough. The conductive member can be fixed to the electrode by a nut 133. The conductive member 20 is integrated to ensure charging current. The conductive member 20 can be adapted to suit different needs, such as the number of batteries. For example, according to the number of batteries that need to be connected in parallel in the battery module, the lengths of the first portion 21 and the second portion 22 of the conductive member 20 can be increased, and the number of the through holes 211 on the first portion 21 and the second portion 22 can be adjusted to meet the battery module. Parallel connection between the batteries; or, according to the distance between the battery modules, the lengths of the third portion 23 and the fourth portion 24 are adjusted to satisfy the series connection between the plurality of battery modules.

As shown in the seventh and ninth figures, in the present embodiment, the conductive member 20 further includes a fifth portion 25 and a sixth portion 26. The fifth portion 25 and the sixth portion 26 are both parallel to the third portion 23 and the fourth portion 24, and are simultaneously connected to the first portion 21 and the second portion 22. Likewise, the fifth portion 25 and the sixth portion 26 can increase the ability of the conductive member 20 to overcurrent. Of course, as the number of batteries increases, a seventh portion, an eighth portion, and the like may be disposed between the first portion 21 and the second portion 22.

The first portion 21, the second portion 22, and the third portion 23 of the conductive member 20 together define a "U" shape. Similarly, the first portion 21, the second portion 22, the third portion 23, and the fourth portion 24 of the conductive member 20 together define a "mouth" shape; the first portion 21, the second portion 22, and the third portion 23 of the conductive member 20 The fourth portion 24 and the fifth portion 25 together define a "day" shape; the first portion 21, the second portion 22, the third portion 23, the fourth portion 24, the fifth portion 25, and the sixth portion 26 of the conductive member 20 Together define a "mesh" glyph.

As shown in the seventh figure, the buffer portion 221 is further disposed on the third portion 23 of the conductive member 20. When the battery is displaced due to vibration, the distance between adjacent batteries or battery packs may increase, so the setting of the buffer strip 221 is obviously necessary for ensuring the normal operation of the conductive member 20. In this embodiment, the buffer belt 221 is arched and can function as a tensile resistance. Similarly, a buffer strip is also provided on the fourth portion 24 and/or the fifth portion 25 and/or the sixth portion 26. The battery may also thermally expand and the spacing between the battery housings 13 may become larger, so that at least one buffer belt may be disposed between the first portion 21 and the second portion 22. Preferably, the buffer belt needs to be disposed in the first portion 21 and The two portions 22 are between the respective through holes.

As shown in the seventh and eighth figures, the positive electrode and the negative electrode of the adjacent two rows of cells can be connected in series by the third portion 23. The positive electrode or the negative electrode in the same row of batteries may adopt a long straight second conductive member 27, and the second conductive strip 27 includes a second through hole 271 and a second buffer disposed between the adjacent second through holes 271. With 272.

As can be seen from the above embodiments, the series and parallel connection between the plurality of batteries can be realized by an integrally formed conductive member, so that the conductive member can withstand a large overcurrent. In addition, the conductive member 20 has a buffer belt to ensure that the conductive member can still work normally when the distance between adjacent batteries changes.

It is to be understood that the description is not to be construed as limited to The technical solutions in the embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

The detailed description of the preferred embodiments of the present invention is not intended to limit the scope of the present invention. All should be included in the scope of protection of the present invention.

100. . . Battery pack

11. . . Top bracket

12. . . Bottom bracket

13. . . Battery housing

14. . . Insulating cover

144. . . aisle

111. . . Containment gap

112. . . Screw column

113. . . First gap

114. . . Battery containment area

115. . . Partition plate

121. . . Square battery containment area

122. . . Second gap

123. . . Partition plate

141. . . screw hole

142. . . Top wall

143. . . Side wall

131. . . Positive electrode

132. . . Negative electrode

133. . . Nut

20. . . Conductive cover

twenty one. . . first part

twenty two. . . the second part

twenty three. . . the third part

twenty four. . . fourth part

25. . . the fifth part

26. . . the sixth part

211. . . Through hole

221. . . Buffer zone

27. . . Second conductive strip

271. . . Second through hole

272. . . Second buffer zone

The first figure is a perspective view of a battery assembly after a battery module frame and a battery are combined in a specific embodiment of the present invention;

2 is a perspective view of a top bracket in a battery module frame according to an embodiment of the present invention;

The third figure is a perspective view of another angle of the top bracket in the battery module frame in the embodiment of the present invention;

The fourth figure is a perspective view of a bottom bracket in a battery module frame according to an embodiment of the present invention;

5 is a perspective view of an insulating cover in a battery module frame according to an embodiment of the present invention;

Figure 6 is a perspective view of a battery case in accordance with an embodiment of the present invention;

7 is a perspective view of a specific embodiment of a conductive member in the present invention;

Figure 8 is a perspective view of another embodiment of the conductive member of the present invention;

In a ninth embodiment, in a specific embodiment of the present invention, a battery housed in a battery module frame is interconnected by a conductive member.

11. . . Top bracket

12. . . Bottom bracket

13. . . Battery housing

27. . . Second conductive strip

twenty one. . . first part

twenty two. . . the second part

twenty four. . . fourth part

25. . . the fifth part

26. . . the sixth part

Claims (10)

A battery assembly, wherein the battery assembly comprises: at least two separate first and second battery modules, each battery module comprising at least two batteries, each battery having a positive electrode and a negative electrode; The first portion of the two positive electrodes of the at least two batteries connected in parallel with the first battery module, the second portion of the two negative electrodes of the at least two batteries of the parallel second battery module, and the first battery module in series a third portion of the negative electrode of a battery and a negative electrode of a battery of the second battery module, the third portion being flat. The battery assembly of claim 1, wherein the conductive member further comprises a fourth electrode of a positive electrode of another battery of the first battery module and a negative electrode of another battery of the second battery module. The battery assembly of claim 1, wherein the first portion is parallel to the second portion. The battery assembly of claim 1, wherein the third portion is perpendicular to the first portion and the second portion. The battery assembly of claim 2, wherein the fourth portion is parallel to the third portion and perpendicular to the first portion and the second portion. The battery assembly according to claim 1, wherein the conductive member is provided with a through hole through which the positive and negative electrodes of the battery pass. The battery assembly of claim 6, wherein the third portion of the conductive member is provided with a buffer strip between adjacent through holes. The battery assembly of claim 6, wherein the first portion and/or the second portion of the conductive member are provided with a buffer strip between adjacent through holes. The battery assembly of claim 7 or 8, wherein the buffer belt is arched. The battery assembly of claim 1, wherein the battery module comprises a top bracket, the top bracket covers the battery and is provided with an opening for the battery electrode to pass through, and the conductive member is disposed on the top bracket. on.