CN205211862U - Laminate polymer battery module - Google Patents

Abstract

The utility model provides a soft-pack battery module, which includes at least one battery cell and a cover plate. At least one battery cell is arranged along an arrangement direction, and each battery cell includes: a single soft-pack battery, provided with two pole ears with opposite polarities; an insulating frame, accommodating and fixing the single soft-pack battery; and two connecting pieces, fixed on the insulating frame, respectively electrically connected to the two pole ears of the single soft-pack battery, fixing and protecting the corresponding pole ears, and extending from the insulating frame to be electrically connected to the outside. The cover plate is arranged at the end of the arrangement direction of the at least one battery cell, and is fixedly connected to the insulating frame of the battery cell at the end of the arrangement direction of the at least one battery cell. The soft-pack battery module provided by the utility model can fix and protect the soft-pack battery, avoid the soft-pack shell and the pole ears on the outside of the soft-pack battery from being damaged when the soft-pack battery is subjected to vibration and impact, and can conveniently connect multiple soft-pack batteries in series and parallel.

Description

Soft pack battery module

technical field

The utility model relates to the field of batteries, in particular to a soft pack battery module.

Background technique

The energy crisis and the increasingly serious environmental pollution have caused automobile technology to undergo major technological changes such as fuel diversification and power electrification. Electric vehicles with the advantages of high efficiency, energy saving, low emission or zero emission have great potential for development, and have received extensive attention from all over the world. Many countries have begun to focus on research on new energy vehicles. Among them, lithium-ion powered vehicles are one of the representatives of new energy vehicles. The key technology of lithium-ion powered vehicles is lithium-ion batteries, and its design needs to take into account many factors. On the one hand, it is necessary to ensure that the performance of the battery meets the needs of the vehicle; sex. The pouch battery is a high-performance battery composed of positive electrodes, negative electrodes, electrolytes, and packaging films. It can be charged and discharged at a large rate and has a long service life, so it is widely used in the field of new energy vehicles, E-bike , electric tools and other fields. However, the soft pack battery has the following problems: the aluminum-plastic film is easy to puncture, the top seal fold and the seal are easy to touch and leak, and the aluminum tabs of the battery cells are difficult to weld; it is difficult to connect multiple cells in series and in parallel, and it is easy to weld when welding. Many problems such as short circuit and complicated welding process bring safety hazards to the use of pouch batteries, and also greatly limit the application fields of pouch batteries.

Utility model content

In view of the problems in the background technology, the purpose of this utility model is to provide a soft-pack battery module, which can fix and protect the soft-pack battery, and avoid damage to the soft-pack shell and tabs on the outside of the soft-pack battery when the soft-pack battery is subjected to vibration and impact. At the same time, it is convenient to connect multiple soft-packaged batteries in series and parallel.

In order to achieve the above object, the utility model provides a pouch battery module, which includes at least one battery unit and a cover plate.

The at least one battery unit is arranged along the arrangement direction, and each battery unit includes: a single flexible package battery, provided with two tabs with opposite polarities; an insulating frame, which accommodates and fixes the single flexible package battery; and two connecting pieces, fixed On the insulating frame, it is respectively electrically connected with the two tabs of the single soft package battery, and the corresponding tabs are fixed and protected, and protruded from the insulating frame to be electrically connected with the outside.

The cover plate is arranged at the end of the arrangement direction of the at least one battery unit, and is fixedly connected with the insulating frame of the battery unit at the end of the arrangement direction of the at least one battery unit.

The beneficial effects of the utility model are as follows:

In the soft pack battery module according to the utility model, the fixed connection between the insulating frame of the battery unit and the cover plate can fix and protect the soft pack battery, and prevent the soft pack battery from piercing the outer soft pack shell of the soft pack battery when it is subjected to vibration and impact; At the same time, the connection between the two connecting pieces and the corresponding tabs can fix and protect the tabs, avoiding damage to the tabs when the soft package battery is subjected to vibration and impact; the two connecting pieces can also protrude from the insulating frame and be electrically connected to the outside, which can be convenient Connect multiple flexible pack batteries in series and in parallel.

Description of drawings

Fig. 1 is a perspective view of a soft pack battery module according to the present invention, wherein the number of soft pack batteries is one;

Fig. 2 is an exploded view of the pouch battery module shown in Fig. 1;

3 is a perspective view of the connection of two battery cells of the pouch battery module according to the present invention;

Fig. 4 is an exploded view of the pouch battery module shown in Fig. 3;

Fig. 5 is a perspective view of a soft pack battery module according to the present invention, wherein there are multiple soft pack batteries;

Fig. 6 is a partial exploded view of the pouch battery module shown in Fig. 5;

Figures 7A and 7B are schematic diagrams of the connection between the single-layer structure of the pouch battery module and the tabs according to the present invention, wherein the connecting tab in Figure 7A is set under the tab, and the connecting tab in Figure 7B is set on above the pole ear;

Fig. 8A, Fig. 8B and Fig. 8C are schematic diagrams of the connection between the double-layer structure of the pouch battery module and the tabs according to the present invention. It is different from the structure of the upper layer connecting sheet and the lower layer connecting sheet in Fig. 8C.

Wherein, the reference signs are explained as follows:

1 battery unit 134 upper connecting piece

11 single flexible packaging battery 135 lower connecting piece

111 tab 14 insulating foam

12 insulation frame 2 cover plate

121 fixing plate 21 second opening

1211 first opening 22 second groove

1212 Positioning hole for the first groove 23 cover plate

122 positioning plate 24 card slot for cover plate

1221 tab with opening 3 adapter plate

1222 positioning column 31 plate groove

1223 positioning hole 32 pads

123 connecting plate 33 total positive adapter piece

1231 buckle 34 total negative adapter

1232 card slot 4 security board

13 connecting piece G double-sided tape

131 Arrangement direction of side A

132 front end L left and right directions

133 rear end W front and rear directions

detailed description

The pouch battery module of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 6 , FIG. 7A , FIG. 7B , FIG. 8A , FIG. 8B and FIG. 8C , the pouch battery module according to the present invention includes at least one battery unit 1 and a cover plate 2 .

The at least one battery unit 1 is arranged along the arrangement direction A, and each battery unit 1 includes: a single flexible package battery 11, provided with two tabs 111 with opposite polarities; an insulating frame 12, receiving and fixing the single flexible package battery 11; And two connecting pieces 13, fixed on the insulating frame 12, respectively electrically connected with the two tabs 111 of the single soft package battery 11 and fixing and protecting the corresponding tabs 111, and protruding from the insulating frame 12 to communicate with the external electrical connect.

The cover plate 2 is arranged at the end of the arrangement direction A of the at least one battery unit 1 , and is fixedly connected to the insulating frame 12 of the battery unit 1 at the end of the arrangement direction A of the at least one battery unit 1 .

In the soft-pack battery module according to the present utility model, the fixed connection between the insulating frame 12 of the battery unit 1 and the cover plate 2 can fix and protect the soft-pack battery, and prevent the soft-pack battery from piercing the outside of the soft-pack battery when it is subjected to vibration and impact. Soft packaging shell (for example, made of insulating aluminum-plastic film); at the same time, the two connecting pieces 13 are connected to the corresponding tabs 111 to fix and protect the tabs 111, and avoid damage to the tabs 111 when the soft package battery is subjected to vibration and impact; two The connecting piece 13 can also protrude from the insulating frame 12 and be electrically connected to the outside, which can conveniently connect a plurality of soft-packaged batteries in series and in parallel.

In the soft pack battery module according to the present utility model, with reference to Fig. 1 and Fig. 2, in one embodiment, each insulating frame 12 has: a fixing plate 121 for fixing the single soft pack battery 11; a positioning plate 122 for setting At the front end of the front-rear direction W of the fixed plate 121, there are two openings 1221 for tabs, for the connecting piece 13 to protrude from the insulating frame 12; .

In the pouch battery module according to the present invention, referring to FIG. 1 and FIG. 2 , in an embodiment, the fixing plate 121 may have a first opening 1211 in the middle area. The first opening 1211 can meet the buffer space required by the expansion of the single flexible package battery during use, and prevent the single flexible package battery from being affected by the expansion force and reduce the service life.

In the pouch battery module according to the present utility model, referring to FIG. 1 to FIG. 6 , in one embodiment, the fixing plate 121 is provided with a plurality of first grooves 1212 on both sides of the first opening 1211 in the left-right direction L . The first groove 1212 facilitates the ventilation and heat dissipation of the single soft-packed battery during the use of the soft-pack battery module, and prevents the heat accumulation of the soft-pack battery module from reducing the service life of the single soft-packed battery.

In the pouch battery module according to the present utility model, referring to FIG. 4 , in one embodiment, the positioning plate 122 also has: a positioning post 1222 arranged on one side of the alignment direction A of the positioning plate 122; and a positioning hole 1223 , arranged on the other side of the alignment direction A of the positioning plate 122 to accommodate the positioning column 1222 of the positioning plate 122 of the insulating frame 12 of the adjacent battery unit 1 . The positioning hole 1223 cooperates with the positioning post 1222 of the adjacent battery unit 1 to facilitate the positioning of two adjacent battery units 1 .

In the pouch battery module according to the present invention, in an embodiment, when the pouch battery module has one battery unit 1 , the positioning plate 122 may not have a positioning hole 1223 .

In the pouch battery module according to the present invention, referring to FIG. 2 , FIG. 7A and FIG. 7B , in one embodiment, each connecting piece 13 has a front end 132 , a rear end 133 and two side ends 131 . Correspondingly, referring to FIG. 2, the two side ends 131 of each connecting piece 13 extend into the insulating frame 12 and are fixed on the insulating frame 12; the rear ends 133 of each connecting piece 13 are electrically connected and fixed to the corresponding tabs 111 The tab 111 corresponding to the protection; the front end 132 of each connecting piece 13 protrudes out of the insulating frame 12 through the opening 1221 for the tab to be electrically connected to the outside.

In the pouch battery module according to the present invention, referring to FIG. 7A and FIG. 7B , in one embodiment, the connecting piece 13 is a single-layer structure.

In the pouch battery module according to the present invention, referring to FIG. 7A , in one embodiment, the tab 111 is fixed and electrically connected above the corresponding connecting piece 13 .

In the pouch battery module according to the present invention, referring to FIG. 7B , in one embodiment, the tabs 111 are fixed and electrically connected under the corresponding connecting pieces 13 .

In the pouch battery module according to the present utility model, referring to FIG. 8A , FIG. 8B and FIG. 8C , in one embodiment, the connecting piece 13 has a double-layer structure.

In the pouch battery module according to the present invention, referring to FIG. 8A , FIG. 8B and FIG. 8C , in one embodiment, the connecting piece 13 has an upper connecting piece 134 and a lower connecting piece 135 .

In the pouch battery module according to the present utility model, referring to Fig. 8A, Fig. 8B and Fig. 8C, in one embodiment, the tab 111 is fixed and electrically connected to the upper connecting piece 134 and the lower connecting piece 135 of the corresponding connecting piece 13 between.

In the pouch battery module according to the present invention, referring to FIG. 8A , in one embodiment, the upper connecting piece 134 and the lower connecting piece 135 of the connecting piece 13 have the same structure.

In the pouch battery module according to the present invention, referring to FIG. 8B and FIG. 8C , in one embodiment, the upper connecting piece 134 and the lower connecting piece 135 of the connecting piece 13 have different structures.

In the pouch battery module according to the present utility model, with reference to Fig. 8B, in one embodiment, the lower connecting piece 135 of the connecting piece 13 is fixed on the insulating frame 12, and the upper connecting piece 134 of the connecting piece 13 is connected with the insulating frame 12 integrally formed.

In the pouch battery module according to the present utility model, with reference to FIG. 8C, in one embodiment, the upper connecting piece 134 of the connecting piece 13 is fixed on the insulating frame 12, and the lower connecting piece 135 of the connecting piece 13 is connected to the insulating frame. 12 integrally formed.

In the pouch battery module according to the present invention, in one embodiment, the upper connecting piece 134 and the lower connecting piece 135 of the connecting piece 13 are integrally formed. Correspondingly, the upper connecting piece 134 of the connecting piece 13 is fixed on the insulating frame 12 ; and/or the lower connecting piece 135 of the connecting piece 13 is fixed on the insulating frame 12 .

In the pouch battery module according to the present utility model, referring to Fig. 3 and Fig. 4, in one embodiment, there are more than two battery units 1; correspondingly, each connecting plate 123 has: buckle 1231, which is arranged on the connection One side of the arrangement direction A of the plates 123; and the locking groove 1232, which is arranged on the other side of the arrangement direction A of the connection plate 123, to receive and engage the buckle of the connection plate 123 of the insulating frame 12 of the adjacent battery unit 1 1231. The connection between the buckle 1231 and the slot 1232 of the adjacent battery unit 1 can securely connect two adjacent battery units 1 .

In the pouch battery module according to the present utility model, referring to FIG. 2 , in one embodiment, there is one battery unit 1; correspondingly, the connecting plate 123 has: buckles 1231 arranged in the arrangement direction A of the connecting plate 123 side. Since the connecting plate 123 does not need to be engaged with the buckles 1231 of other battery units 1 , the connecting plate 123 may not be provided with a locking slot 1232 .

In the pouch battery module according to the present invention, referring to FIG. 2 , FIG. 5 and FIG. 6 , in one embodiment, the cover plate 2 has: a second opening 21 disposed in the middle area of the cover plate 2 . The second opening 21 of the cover plate 2 can provide the required buffer space for the single flexible package battery in contact with the cover plate 2, so as to prevent the single flexible package battery from being affected by expansion force and reduce the service life.

In the pouch battery module according to the present invention, referring to FIG. 2 , FIG. 5 and FIG. 6 , in one embodiment, the cover plate 2 has: a second groove 22 disposed around the second opening 21 . The second groove 22 facilitates the ventilation and heat dissipation of the single flexible package battery in contact with the cover plate 2, preventing the heat accumulation of the single flexible package battery from shortening the service life of the single flexible package battery.

In the pouch battery module according to the present utility model, referring to Fig. 2 and Fig. 6, in one embodiment, the cover plate 2 has: a positioning hole 23 for the cover plate, for accommodating the arrangement of the at least one battery unit 1 The positioning column 1222 of the positioning plate 122 of the insulating frame 12 of the battery unit 1 at the end of the direction A. The cooperation between the positioning column 1222 and the positioning hole 23 for the cover facilitates the positioning connection between the insulating frame 12 of the battery unit 1 and the cover 2 .

In the pouch battery module according to the present utility model, referring to FIG. 2 and FIG. 6 , in one embodiment, the cover plate 2 has: a card slot 24 for the cover plate, which is used to engage the arrangement of the at least one battery unit 1 The buckle 1231 of the connecting plate 123 of the insulating frame 12 of the battery unit 1 at the end of the direction A. The cooperation of the card slot 24 for the cover plate and the buckle 1231 facilitates the fixed connection between the cover plate 2 and the insulating frame 12 of the adjacent battery unit 1 .

In the soft pack battery module according to the present invention, referring to FIG. 2 , FIG. 4 and FIG. 6 , in one embodiment, each single soft pack battery 11 is fixed on the corresponding insulating frame 12 via double-sided adhesive G.

In the soft pack battery module according to the present utility model, referring to Fig. 4 and Fig. 6, in one embodiment, each single soft pack battery 11 is fixed on the insulating frame 12 of the adjacent battery unit 1 via double-sided adhesive G .

In the soft pack battery module according to the present utility model, referring to FIG. 2 and FIG. 6 , in one embodiment, the single soft pack battery 11 of the battery unit 1 at the end of the arrangement direction A of the at least one battery unit 1 passes through The double-sided adhesive G is fixed on the cover plate 2 .

In the soft pack battery module according to the present utility model, referring to Fig. 1 to Fig. 6, in one embodiment, each battery unit 1 further includes: insulating foam 14, which is arranged on the corresponding connection piece of the single soft pack battery 11 13 and the positioning plate 122, the corresponding connecting piece 13 and the tab 111 after electrical connection are elastically supported.

In the pouch battery module according to the present invention, in one embodiment, the connecting piece 13 is a nickel piece.

In the soft pack battery module according to the present utility model, referring to FIG. 7A and FIG. 7B , in one embodiment, the rear end 133 of the connecting piece 13 is electrically connected to the tab 111 of the single soft pack battery 11 by welding. .

In the pouch battery module according to the present utility model, referring to Fig. 5 and Fig. 6, in one embodiment, there are more than two battery units 1; correspondingly, the pouch battery module further includes: an adapter plate 3. Connect to the front end 132 of the connecting piece 13 of each battery unit 1, so as to realize the series-parallel connection of the pouch battery modules.

In the pouch battery module according to the present utility model, referring to Fig. 5 and Fig. 6, in one embodiment, the adapter plate 3 has: plate grooves 31, the number of which is the same as that of the tabs 111 of the pouch battery module Consistent, corresponding plate slots 31 are provided with welding pads 32 around, and the front ends 132 of each connecting piece 13 are inserted into a corresponding plate slot 31 and are electrically connected with the corresponding welding pads 32, so that the at least two single flexible packaging batteries 11 are connected in series and /or in parallel; the total positive adapter piece 33, one end is electrically connected to the total positive output pole after the at least two single flexible packaging batteries 11 are connected in series and/or in parallel; and the total negative pole adapter piece 34, one end is connected to the at least The total negative output poles of the two single soft-packaged batteries 11 connected in series and/or in parallel are electrically connected.

In the pouch battery module according to the present invention, referring to FIG. 5 , in one embodiment, the front end 132 of the connecting piece 13 is fixed on the corresponding pad 32 of the adapter plate 3 by welding.

In the pouch battery module according to the present invention, in an embodiment, the welding is spot welding, laser welding or ultrasonic welding.

In the pouch battery module according to the present invention, in one embodiment, the overall positive connecting piece 33 is a nickel piece.

In the pouch battery module according to the present invention, in one embodiment, the total negative electrode adapter piece 34 is a nickel piece.

In the pouch battery module according to the present invention, referring to FIG. 5 and FIG. 6 , in an embodiment, the pouch battery module further includes: a safety plate 4 fixed on the cover plate 2 .

In the pouch battery module according to the present invention, referring to FIG. 5 and FIG. 6 , in one embodiment, the other ends of the overall positive adapter piece 33 and the overall negative adapter piece 34 are fixed on the safety plate 4 .

Claims (10)

1. a soft-package battery module, comprises at least one battery unit (1), and arrange along orientation (A), each battery unit (1) comprising:

Monomer flexible-packed battery (11), is provided with two opposite polarity lugs (111);

It is characterized in that,

Each battery unit (1) also comprises:

Insulating frame (12), collecting is securing unit flexible-packed battery (11) also; And

Two braces (13), be fixed on Insulating frame (12), be electrically connected with two lugs (111) of monomer flexible-packed battery (11) respectively and fix and protect corresponding lug (111), and from Insulating frame (12) stretch out with external electrical connections;

Described soft-package battery module also comprises:

Cover plate (2), be arranged at the end of the orientation (A) of described at least one battery unit (1), be fixedly connected with the Insulating frame (12) of the battery unit (1) of the end of the orientation (A) of described at least one battery unit (1).

2. soft-package battery module according to claim 1, is characterized in that, each Insulating frame (12) has:

Fixed head (121), for securing unit flexible-packed battery (11);

Location-plate (122), is arranged at the front end of the fore-and-aft direction (W) of fixed head (121), has:

Two lugs, with opening (1221), stretch out from this Insulating frame (12) for brace (13); And

Connecting plate (123), is fixedly installed on the rear end of the fore-and-aft direction (W) of fixed head (121).

3. soft-package battery module according to claim 2, is characterized in that, location-plate (122) also has:

Reference column (1222), is arranged at the side of the orientation (A) of location-plate (122);

Location hole (1223), be arranged at the opposite side of the orientation (A) of location-plate (122), to accommodate the reference column (1222) of the location-plate (122) of the Insulating frame (12) of adjacent battery unit (1).

4. soft-package battery module according to claim 2, is characterized in that,

Each brace (13) has front end (132), rear end (133) and two sides (131);

Two sides (131) of each brace (13) to extend in Insulating frame (12) and are fixed on Insulating frame (12);

The rear end (133) of each brace (13) is electrically connected with corresponding lug (111) and fixes and protect corresponding lug (111);

The front end (132) of each brace (13) via lug opening (1221) reach Insulating frame (12) outward with external electrical connections.

5. soft-package battery module according to claim 1, is characterized in that, brace (13) is single layer structure.

6. soft-package battery module according to claim 1, is characterized in that,

Brace (13) is double-decker, has: upper strata brace (134) and lower floor's brace (135);

Lug (111) is fixedly connected electrically between the upper strata brace (134) of corresponding brace (13) and lower floor's brace (135).

7. soft-package battery module according to claim 2, is characterized in that, each connecting plate (123) has:

Buckle (1231), is arranged at the side of the orientation (A) of connecting plate (123); And

Draw-in groove (1232), be arranged at the opposite side of the orientation (A) of connecting plate (123), to accommodate and to engage the buckle (1231) of the connecting plate (123) of the Insulating frame (12) of adjacent battery unit (1).

8. soft-package battery module according to claim 3, is characterized in that, cover plate (2) has:

Cover plate with location hole (23), for accommodating the reference column (1222) of the location-plate (122) of the Insulating frame (12) of the battery unit (1) of the end of the orientation (A) of described at least one battery unit (1); And

Cover plate with draw-in groove (24), for engaging the buckle (1231) of the connecting plate (123) of the Insulating frame (12) of the battery unit (1) of the end of the orientation (A) of described at least one battery unit (1).

9. soft-package battery module according to claim 4, is characterized in that,

Battery unit (1) is two or more;

Described soft-package battery module also comprises:

Keyset (3), is connected with the front end (132) of the brace (13) of each battery unit (1), for the connection in series-parallel realizing described soft-package battery module.

10. soft-package battery module according to claim 9, is characterized in that,

Keyset (3) has:

Board slot (31), quantitatively consistent with the quantity of the lug (111) of soft-package battery module, corresponding board slot (31) is provided with pad (32) around, the front end (132) of each brace (13) is inserted a corresponding board slot (31) and is electrically connected with corresponding pad (32), with at least two monomer flexible-packed batteries (11) series connection described in making and/or in parallel;

Total positive pole switching piece (33), connect with described at least two monomer flexible-packed batteries (11) in one end and/or total positive output pole after parallel connection is electrically connected; And

Total negative pole switching piece (34), connect with described at least two monomer flexible-packed batteries (11) in one end and/or total negative output pole after parallel connection is electrically connected;

Described soft-package battery module also comprises:

Guard plate (4), is fixed on cover plate (2), and the other end of total positive pole switching piece (33) of keyset (3) and total negative pole switching piece (34) is fixed on guard plate (4).