CN104576994B - Battery block structure and the battery pack comprising it - Google Patents

Abstract

The invention discloses a battery group structure, comprising: two fixing plates that can be arranged at both ends of the battery, and an at least partially conductive connecting plate that can be arranged on a side of the fixing plate that is away from the battery; wherein, the fixing A fixing hole is opened on the plate to limit the end of the battery inside, and a through hole is opened at the bottom of the fixing hole to expose the end of the battery to the side of the fixing plate facing away from the battery, so that the The end of the battery can be welded to the connecting plate through the through hole, and the connecting plate is provided with a limiting slot corresponding to the through hole to limit the welding position. The battery group structure provides good support for the battery by using two fixing plates to clamp the battery in the middle; by opening a through hole at the bottom of the fixing hole, the end of the battery is exposed and fixed to the connecting plate by welding , the series and parallel connection between multiple batteries is realized through the connecting plate, the group structure has few parts, is easy to operate, and is suitable for mass production.

Description

Battery pack structure and battery pack containing it

technical field

The invention relates to the technical field of batteries, in particular to a battery pack structure and a battery pack containing it.

Background technique

In the prior art, in order to obtain a higher battery capacity, it is necessary to connect multiple single cells in series and parallel to form a group. When the batteries are grouped, it is necessary to ensure the stability of the corresponding electrical connection between the multiple single cells. In the event of a short circuit/open circuit; also ensure the corresponding structural stability. For the current series-parallel structure of cylindrical cells used in electric vehicles and large energy storage battery packs, there are mainly the following defects: 1. The battery pack does not have a unified support, the connection between the batteries is disordered and crossed, and the production and installation process and its It is complicated and seriously affects work efficiency; 2. The structure of multi-string modules is difficult to realize; 3. The insulation performance of the modules is not high. For metal casings, insulation boards must be added on all six sides for insulation, which seriously affects the battery. 4. The space utilization rate of the battery module is not high, and the arrangement of the batteries can only be arranged in a matrix, and the space range has not been effectively utilized; 5. The number of fixtures used is large, and the consistency of the entire battery Not strong, and the battery life cannot meet the requirements required by customers. In summary, there is an urgent need to improve the existing technology to solve its actual technical problems.

Contents of the invention

An object of the present invention is to provide a battery pack structure, which has the advantages of simple structure and easy operation, and is conducive to mass production.

Another object of the present invention is to provide a battery pack, the batteries of which are firmly fixed, have good insulation, can save a lot of insulating plates, and realize the lightweight design of the battery pack.

To achieve this goal, the present invention adopts the following technical solutions:

On the one hand, a battery pack structure is provided, including:

Two fixing plates that can be arranged at both ends of the battery;

an at least partially conductive connecting plate that may be disposed on a side of the fixing plate facing away from the battery;

Wherein, the fixed plate is provided with a fixed hole for restricting the battery end inside, and the bottom of the fixed hole is provided with a passage for exposing the battery end to the side of the fixed plate facing away from the battery. holes, so that the end of the battery can be welded to the connection plate through the through hole, and the connection plate is provided with a limiting groove corresponding to the through hole to limit the welding position.

Preferably, a groove is provided on a side of the fixing plate facing away from the battery, and the groove is matched with the connecting plate so that the connecting plate is installed in the groove.

Preferably, the groove has at least two opposite ends, and a first concave-convex structure is provided at either end of the groove; the connecting plate has at least two opposite ends, and A second concave-convex structure matching the first concave-convex structure is arranged on the upper part, and when the connecting plate is connected with the fixing plate, the first concave-convex structure and the second concave-convex structure are plugged and fitted with each other.

Preferably, a first connecting hole is opened through the fixing plate at the opposite end of the groove provided with the first concave-convex structure; at the opposite end of the connecting plate provided with the second concave-convex structure The other end is provided with a second connecting hole, and the fixing plate and the connecting plate are locked and fixed by connecting pieces arranged in the first connecting hole and the second connecting hole.

Preferably, a depression is provided on the side of the fixing plate close to the battery corresponding to the first connection hole, and the first connection hole sinks to the bottom of the depression.

Preferably, a first heat dissipation hole is provided on the fixing plate near the fixing hole, and a second heat dissipation hole is provided on the connecting plate corresponding to the first heat dissipation hole for heat dissipation of the battery pack.

Preferably, a bump is provided on the side of the fixing plate facing away from the battery at a position corresponding to the first cooling hole, the first cooling hole passes through the bump, and the bump is connected to the second cooling hole Matching, when the connection board is connected to the fixing board, the protrusion is limited in the second heat dissipation hole.

In another aspect, a battery pack is provided, including at least one single module structure, wherein the single module structure includes: a plurality of batteries and the battery group structure;

Wherein, the battery pack structure includes:

two fixing plates arranged at both ends of the plurality of batteries;

an at least partially conductive connecting plate disposed on a side of the fixing plate facing away from the battery,

Wherein, the fixed plate is provided with a fixed hole for restricting the battery end inside, and the bottom of the fixed hole is provided with a passage for exposing the battery end to the side of the fixed plate facing away from the battery. The end of the battery is welded to the connection plate through the through hole, and the connection plate is provided with a limit slot corresponding to the through hole to limit the welding position.

Preferably, an overcurrent protection strip is provided on a side of the connecting plate away from the fixing plate.

Preferably, the battery pack includes a plurality of single-module structures, and the plurality of single-module structures are connected in series, and are glued between adjacent single-module structures and between respective fixing plates. Attached with flame retardant mat.

Compared with the prior art, the present invention has the beneficial effect: the battery group structure uses two fixing plates to clamp the battery in the middle, and a fixing hole is set on the fixing plate, so that the end of the battery is embedded in the fixing hole, and the two The fixing plate provides good support for the battery; by opening a through hole at the bottom of the fixing hole, the end of the battery is exposed and fixed to the connecting plate by welding, so that the electrodes at the end of the battery can be led to the connecting plate. The series-parallel connection between multiple batteries is realized through the connection plate, and the group structure has few parts, which is easy to operate and is suitable for mass production; by setting the limit groove on the connection plate, it can ensure that it is not easy to desolder and meet the consistency requirements of the battery .

Description of drawings

The present invention will be described in further detail below according to the drawings and embodiments.

Fig. 1 is a schematic view of the front structure of a fixing plate provided according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the reverse structure of the fixed plate shown in Fig. 1;

Fig. 3 is a schematic structural diagram of a connecting plate provided according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a single module structure of a battery pack provided according to an embodiment of the present invention;

5 is a schematic structural view of a battery pack according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a single module structure according to another embodiment of the present invention.

In the picture:

1. Fixed plate; 11. First body; 111. Fixing hole; 112. First side; 113. Second side; 114. Through hole; 115. Groove; 116. Cooling hole; 117. Bump; 118. 119, first connection hole; 120, depression; 2, connecting plate; 21, second body; 211, limit groove; 212, slot hole; 213, second concave-convex structure; Connection hole; 3. Single module structure; 4. Battery; 5. Overcurrent protection strip.

detailed description

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

An embodiment of the present invention provides a battery group structure, including: two fixing plates that can be arranged at both ends of the battery, and an at least partially conductive connecting plate that can be arranged on a side of the fixing plate that is away from the battery; wherein, The fixing plate is provided with a fixing hole for restricting the battery end inside, and the bottom of the fixing hole is provided with a through hole for exposing the battery end to the side of the fixing plate facing away from the battery, The end of the battery can be welded to the connection plate through the through hole, and the connection plate is provided with a limit slot corresponding to the through hole to limit the welding position. The battery group structure uses two fixing plates to clamp the battery in the middle, and sets fixing holes on the fixing plates so that the ends of the batteries are embedded in the fixing holes. The two fixing plates provide good support for the batteries; A through hole is opened at the bottom of the hole to expose the end of the battery, and it is fixed to the connecting plate by welding, so that the electrodes at the end of the battery are led to the connecting plate, and the series and parallel connection between multiple batteries is realized through the connecting plate, forming a The group structure has few parts, is easy to operate, and is suitable for mass production; by setting a limit groove on the connecting plate, it can ensure that it is not easy to desolder and meet the consistency requirements of the battery.

Fig. 1 is a schematic diagram of the front structure of a fixing plate provided according to an embodiment of the present invention. Fig. 2 is a schematic diagram of the reverse structure of the fixing plate shown in Fig. 1 . As shown in Figures 1 and 2, in this embodiment, the fixing plate 1 includes a plate-shaped first body 11, and a fixing hole 111 is opened on the first body 11, and the fixing hole 111 is used to install the battery end, and the battery end Stored inside. The first body 11 has two opposite sides, respectively the first side 112 and the second side 113, and the fixing hole 111 is a blind hole opened from the first side 112 to the second side 113, so that it can support the battery . The shape of the fixing hole 111 matches the shape of the corresponding battery. In this embodiment, the fixing hole 111 is a circular hole. In other embodiments of the present invention, the fixing hole can also be a square hole or a special-shaped hole. The number of fixing holes 111 is configured according to actual needs. In this embodiment, there are multiple fixing holes 111 arranged on the fixing plate 1 in an aligned rectangular array. In other embodiments, the fixing holes 111 may also be arranged in a staggered arrangement.

The bottom of the fixing hole 111 is provided with a through hole 114. The through hole 114 communicates the fixing hole 111 with the second side 113. When the end of the battery is installed in the fixing hole 111, the end of the battery can be exposed to the second side through the passage 114. 113, which is convenient for external connection and fixing of the battery. The through hole 114 of this embodiment is a circular hole, mainly to meet the needs of cylindrical batteries. Can.

Fig. 3 is a schematic structural diagram of a connecting plate provided according to an embodiment of the present invention. As shown in FIG. 3 , in this embodiment, the connecting plate 2 includes a sheet-shaped second body 21, on which there is a battery welding position, and the battery welding position is provided with a limiting groove 211, and the limiting groove 211 welds the battery. When the end of the battery is welded to the connection plate 2 through the through hole 114, it can only be welded in the limiting groove 211. On the one hand, there is no need for welding positioning, which provides convenience for welding work and is conducive to improving welding efficiency. , On the other hand, it can also avoid the occurrence of desoldering and maintain the consistency of the battery pack.

As shown in Figure 2, a groove 115 is set on the side of the fixing plate 1 away from the battery, that is, a groove 115 is set on the second side 113, and the groove 115 matches the connecting plate 2, so that the connecting plate 2 can be installed in the groove 115. By setting the groove 115, the assembly efficiency of the connecting plate 2 and the fixing plate 1 can be improved, and it can also play a role of limiting the connecting plate 2, so that the connection between the connecting plate 2 and the fixing plate 1 is more stable.

As shown in Figures 2 and 3, the groove 115 has at least two opposite ends, and a first concave-convex structure 118 is arranged at any end of the groove 115, and the connecting plate 2 has at least two opposite ends, and the connecting plate 2 has two opposite ends. A second concave-convex structure 213 matching the first concave-convex structure 118 is provided at either end, and when the connecting plate 2 is connected to the fixed plate 1 , the first concave-convex structure 118 and the second concave-convex structure 213 are plugged together. By arranging two concave-convex structures inserted into each other, the function of connecting and positioning the connecting plate 2 and the fixing plate 1 is played. In this embodiment, the groove 115 has a first end portion of the groove and a second end portion of the groove, the connecting plate 2 has a first end portion of the connecting plate and a second end portion of the connecting plate, and the first concave-convex structure 118 is arranged on the groove At the second end of the slot, the second concave-convex structure 213 is disposed on the second end of the connecting plate.

A first connection hole 119 is opened through the fixing plate 1 at the opposite end of the groove 115 provided with the first concave-convex structure 118, and at the opposite end of the connecting plate provided with the second concave-convex structure 213. The second connecting hole 214 , the fixing plate 1 and the connecting plate 2 are locked and fixed by the connecting pieces disposed in the first connecting hole 119 and the second connecting hole 214 . In this embodiment, a first connection hole 119 is provided at the first end of the groove 115, and a second connection hole 214 is provided at the first end of the connection plate, wherein the first connection hole 119 and the second connection hole 214 is a threaded hole, and the fixed connection between the fixed plate 1 and the connecting plate 2 is realized by screwing in bolts.

On the side of the fixing plate 1 close to the battery, a depression 120 is provided corresponding to the first connection hole 119. The first connection hole 119 sinks at the bottom of the depression 120. When the connector is placed in the first connection hole 119, it is not exposed to the depression. 120. Through the design, the connecting piece can be sunk in the recess to prevent short circuit of the battery. In this embodiment, a recess 120 is provided on the first side 112 of the fixing plate 1, and the recess 120 is set at the corresponding position of the first connection hole 119, so that the first connection hole 119 sinks at the bottom of the recess 120, and the direction from the first side 112 to A bolt is screwed into the first connection hole 119 , and when tightened, the bolt sinks into the recess 120 , which can effectively prevent the short circuit of the battery.

According to an embodiment of the present invention, a first heat dissipation hole is provided on the fixing plate near the fixing hole, and a second heat dissipation hole is provided on the connection plate corresponding to the first heat dissipation hole for heat dissipation of the battery pack. As shown in Figure 1, on the fixing plate 1 near the fixing hole 111, a cooling hole 116 through the main body 11 is opened, and the number of the cooling holes 116 is set according to the actual needs of the battery pack. There are multiple, and evenly arranged on the fixed plate 1. The heat dissipation holes 116 can be circular holes, square holes or special-shaped holes, and the heat dissipation holes 116 in this embodiment are circular holes. As shown in Figure 3, slot-shaped holes 212 are provided on the connection plate 2 corresponding to the heat dissipation holes 116. When the connection plate 2 is connected to the fixed plate 1, the slot-shaped holes 212 communicate with the heat dissipation holes 116 to form air convection channels to realize the battery. Thermal work.

As shown in Figure 2, on the side of the fixed plate 1 away from the battery (i.e. the second side 113), a bump 117 is provided at the position corresponding to the cooling hole 116, and the cooling hole 116 runs through the bump 117, and the bump 117 is in contact with the grooved hole. 212 , when the connecting plate 2 is connected to the fixing plate 1 , the protrusion 117 is limited in the slot-shaped hole 212 . By setting the bump 117 and making the heat dissipation hole 116 penetrate the bump 117, without affecting the heat dissipation effect, the cooperation between the bump 117 and the groove hole 212 is more conducive to quickly connecting the connecting plate 2 and the fixing plate 1 , also can make connecting plate 2 and fixing plate 1 connect more firmly simultaneously.

An embodiment of the present invention also provides a battery pack, which includes at least one single-module structure. FIG. 4 is a schematic structural diagram of the single-module structure of the battery pack according to an embodiment of the present invention. As shown in Figure 4, in this embodiment, the single module structure 5 includes: a plurality of batteries 4 and a battery group structure, wherein the battery group structure includes: two fixing plates 1 arranged at both ends of the plurality of batteries 4 , and an at least partially conductive connecting plate 2 arranged on the side of the fixing plate 1 facing away from the battery 4, wherein the fixing plate 1 is provided with a fixing hole for limiting the end of the battery 4 inside, and the fixing hole The bottom of the bottom is provided with a through hole for exposing the end of the battery 4 to the side of the fixed plate 1 facing away from the battery 4, and the end of the battery 4 is welded to the connecting plate 2 through the through hole. A limiting slot 211 for limiting the welding position is provided on the connecting plate 2 corresponding to the through hole. The batteries in the battery pack of the invention are installed firmly and are convenient to assemble.

An overcurrent protection strip 5 is provided on the side of the connecting plate 2 away from the fixing plate 1 for overcurrent protection of the battery pack. As shown in Figure 4, in this embodiment, the side of the first end of the connection plate of the connection plate 2 away from the fixed plate 1 is provided with an overcurrent protection strip 5, and the third connection hole is opened on the overcurrent protection strip 5, and the third The connecting hole communicates with the first connecting hole 119 and the second connecting hole 214, and by placing the connector in the first connecting hole 119, the second connecting hole 214 and the third connecting hole, the fixed plate 1, the connecting plate 2 and the connecting plate are realized. The connection of the overcurrent protection bar 5 is fixed. The overcurrent protection bar 5 of this embodiment is made of copper bars, and the specification and quantity of the copper bars can be implemented according to the charging and discharging standards of the battery pack.

A plurality of batteries 4 are arranged in an aligned rectangular array, and the corresponding fixing holes on the fixing plate 1 and the limiting slots on the connecting plate 2 are also arranged in an aligned rectangular array. Fig. 6 is a schematic diagram of a single module structure according to another embodiment of the present invention. As shown in FIG. 6 , a plurality of batteries 4 are arranged in a staggered arrangement, and the corresponding fixing holes on the fixing plate 1 and the limiting grooves on the connecting plate 2 are also arranged in a staggered arrangement.

FIG. 5 is a schematic structural diagram of a battery pack according to an embodiment of the present invention. As shown in Figure 5, in this embodiment, the battery pack includes a plurality of single module structures 3, and the plurality of single module structures 3 are connected in series, between adjacent single module structures 3 and on respective fixing plates 1 is bonded with a flame retardant pad. By setting the flame retardant pad, on the one hand, the flame retardant effect of the battery pack is enhanced, and on the other hand, the connection firmness between the single module structures is enhanced. In this embodiment, the battery pack includes six single-module structures 3, and the adjacent single-module structures 3 are connected in series by bolts. structural reliability.

The fixing plate 1 of the present invention is made of insulating material, which can provide good insulation, especially for batteries with metal casings, which saves a lot of insulating plates and realizes a lightweight design. Preferably, the fixed plate 1 is made of ABS flame retardant material.

The connecting plate 2 of the present invention can conduct electricity at least partially, and the implementation methods include but are not limited to: the second body 21 of the connecting plate 2 is made of insulating material, the battery welding position is made of conductive material, such as a conductive hole, and the battery end is welded to the battery welding position When the adjacent single-module structures are connected in series, the adjacent battery welding positions are connected to realize the battery series connection; by setting the conductive pattern on the connecting plate 2, the adjacent battery welding positions are electrically connected to realize the battery connection. of parallel connection.

In the description of the present invention, it should be understood that the terms "first", "second", and "third" are only used for distinction in description and have no special meaning.

It should be stated that the above-mentioned specific implementation methods are only preferred embodiments of the present invention and the applied technical principles. Within the technical scope disclosed in the present invention, any changes or substitutions that are easily conceivable by those skilled in the art, All should be covered within the protection scope of the present invention.

Claims (7)

1. a kind of battery block structure, it is characterised in that including：

It may be placed at two fixed plates at battery two ends；

It may be placed at the conductive connecting plate of at least part of the one side away from battery of the fixed plate；

Wherein, opened up in the fixed plate the battery end to be limited in interior fixing hole, the bottom of the fixing hole The through hole of the one side away from battery battery end to be exposed to the fixed plate is opened up, so that the battery end can Correspond to the through hole through the through hole and the connection plate weld, on the connecting plate to set to limit welding position Stopper slot；

Groove is set in the fixed plate and the one side that battery deviates from, the groove matches with the connecting plate, so that The connecting plate is installed in the groove；

The groove at least has two relative ends, and the first concaveconvex structure is set in the either end of the groove；The company Fishplate bar at least has two relative ends, second matched in the either end setting of the connecting plate with the first concaveconvex structure Concaveconvex structure, when the connecting plate is connected with the fixed plate, first concaveconvex structure and the second concaveconvex structure phase Mutual grafting coordinates,

The relative the other end in end that the groove is provided with the first concaveconvex structure opens up first through the fixed plate Connecting hole；The relative the other end in end that the connecting plate is provided with the second concaveconvex structure sets the second connecting hole, described Fixed plate and the connecting plate are locked by the connector being arranged in the first connecting hole and the second connecting hole；

Set in connecting plate away from the side of fixed plate and the 3rd connecting hole is opened up in overcurrent protection bar, overcurrent protection article, the 3rd connects Hole is connect to connect with the first connecting hole and the second connecting hole.

2. battery block structure according to claim 1, it is characterised in that in the fixed plate close to battery one side Upper to correspond to first connecting hole setting depression, first connecting hole is sunken to the bottom of the depression.

3. battery block structure according to claim 2, it is characterised in that in the position in the fixed plate close to fixing hole Put and open up the first heat emission hole, the second heat emission hole is set in the first heat emission hole of correspondence on the connecting plate, to be carried out to battery pack Radiating work.

4. battery block structure according to claim 3, it is characterised in that deviate from the one side of battery in the fixed plate The position of upper correspondence first heat emission hole sets projection, and first heat emission hole runs through the projection, the projection with it is described Second heat emission hole is matched, and when the connecting plate is connected with the fixed plate, the projection is limited in second heat emission hole It is interior.

5. a kind of battery pack, it is characterised in that including at least one single modular structure, wherein, single modular structure includes：It is many Individual battery and the battery block structure as described in any one of Claims 1-4；

Wherein, the battery block structure includes：

It is arranged at two fixed plates at the two ends of multiple batteries；

The fixed plate is arranged at away from the conductive connecting plate of at least part of the one side of the battery,

Wherein, opened up in the fixed plate the battery end to be limited in interior fixing hole, the bottom of the fixing hole The through hole of the one side away from battery battery end to be exposed to the fixed plate is opened up, the battery end passes through institute State and correspond to through hole setting on through hole and the connection plate weld, the connecting plate to limit the spacing of welding position Groove.

6. battery pack according to claim 5, it is characterised in that set in the connecting plate away from the side of the fixed plate Put overcurrent protection bar.

7. the battery pack according to claim 5 or 6, it is characterised in that described battery pack includes multiple single mode groups Structure, multiple single modular structures are mutually concatenated, between adjacent single modular structure and positioned at respective fixed plate it Between be bonded with resistance cushion.