CN216980808U - A division board subassembly and battery package for fixing battery piece - Google Patents

Abstract

The utility model discloses a separation plate component and a battery pack for fixing a battery strap, wherein the separation plate component comprises: the first isolation plate is provided with a group of first lower holes and a group of second lower holes, and the first lower holes are mutually separated along the width direction of the first isolation plate in a one-to-one correspondence manner; the second isolation plate and the second isolation plate are oppositely arranged on the first isolation plate, a group of first upper holes and a group of second upper holes are formed in the second isolation plate, and the first upper holes are mutually separated along the width direction of the second isolation plate in a one-to-one correspondence mode; at least one central part of each first isolation plate and each second isolation plate is inwards concave towards the direction away from each other and is arranged between the first isolation plate and the second isolation plate to form a closed hollow cavity, and cooling water is stored in the closed hollow cavity in an operable mode. Because the cooling liquid is filled in the hollow cavity, the battery can be cooled, the occurrence of thermal runaway of the battery pack is reduced, and the safety of the battery pack is improved.

Description

A division board subassembly and battery package for fixing battery piece

Technical Field

The embodiment of the utility model relates to the field of batteries, in particular to a separation plate component for fixing a battery strap and a battery pack.

Background

With the rapid development of electric vehicles, the requirements for energy density and safety of battery packs are higher and higher, and the battery pack is a trend of increasing the energy density of the battery pack and reducing the cost.

The inventor finds that the current battery pack is easy to generate thermal runaway when the battery pack is improperly used, and particularly in summer, the battery pack can generate serious thermal runaway due to outdoor high temperature and high temperature generated in the battery pack when a vehicle runs, and even a fire can be caused to cause spontaneous combustion of the whole vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a separation plate assembly for fixing a battery strap and a battery pack, which can reduce the occurrence of thermal runaway of the battery pack and improve the safety of the battery pack.

In order to solve the above technical problem, an embodiment of the present invention provides a separator assembly for fixing a battery strap, including:

the first isolation plate is provided with a group of first lower holes and a group of second lower holes, and the first lower holes in the group of first lower holes are arranged along the length direction of the first isolation plate; each second lower hole in the group of second lower holes is arranged along the length direction of the first isolation plate and is mutually separated from each first lower hole in a one-to-one correspondence manner along the width direction of the first isolation plate;

the second isolation plate and the second isolation plate are oppositely arranged on the first isolation plate, a group of first upper holes and a group of second upper holes are formed in the second isolation plate, and the first upper holes in the group of first upper holes are arranged along the length direction of the second isolation plate; each second upper hole in the group of second upper holes is arranged along the length of the second isolation plate and is mutually separated from each first upper hole in a one-to-one correspondence manner along the width direction of the second isolation plate;

the first upper holes and the first lower holes are correspondingly arranged one by one and are mutually attached, and the second upper holes and the second lower holes are correspondingly arranged one by one and are mutually attached;

at least one central part of each first isolation plate and each second isolation plate is inwards concave towards the direction away from each other and is formed into a closed hollow cavity between the first isolation plate and the second isolation plate, and cooling water is stored in the closed hollow cavity in an operable mode.

Compared with the prior art, the embodiment of the utility model has the advantages that the sealed hollow cavity is formed between the first isolation plate and the second isolation plate, and the cooling liquid is filled in the hollow cavity, so that when the isolation plate component fixes the bars of the batteries, the isolation plate component can be released from the batteries to cool the batteries, the occurrence of thermal runaway of the battery pack is reduced, and the safety of the battery pack is improved.

In an embodiment, the partition plate assembly further includes a water pipe disposed on the first partition plate or the second partition plate and communicated with the hollow cavity.

In one embodiment, the water pipe is disposed at one side of the first isolation plate or the second isolation plate in the length direction.

In an embodiment, a side of the second isolation plate, which is away from the first isolation plate, is provided with a plurality of grooves, each groove corresponds to one first upper hole or one second upper hole, and each first upper hole and each second upper hole are provided with a groove bottom corresponding to each groove;

wherein, the tank bottom of recess and first division board sealing connection.

In one embodiment, part of two adjacent grooves are communicated.

In one embodiment, the second separator plate includes:

the panel is arranged opposite to the first isolation plate, and each first upper hole and each second upper hole are formed in the panel;

the side frame is coaxially and fixedly connected with the panel, and the side frame extends from the panel to the first isolation plate; and

the connecting frame, the connecting frame with the frame is kept away from the coaxial fixed connection in panel one side, the connecting frame with first division board sealing connection forms well cavity.

In one embodiment, the first separator plate includes:

the bottom plate is arranged opposite to the panel, and each first upper hole and each second upper hole are formed in the bottom plate;

the first side plate and the second side plate are oppositely arranged on two sides of the bottom plate in the length direction, and both the first side plate and the second side plate extend from the bottom plate direction to the panel direction;

the first connecting plate is arranged at one end, far away from the bottom plate, of the first side plate and is fixedly connected with the connecting frame; and

and the second connecting plate is arranged at one end, far away from the bottom plate, of the second side plate and is fixedly connected with the connecting frame.

In one embodiment, the side of the first separation plate far away from the second separation plate is arranged towards the explosion-proof valve of the battery, and the thickness of the first separation plate is 0.2-0.8 mm.

The present invention also provides a battery pack, including:

the above-mentioned baffle assembly used for fixing the battery piece;

the batteries are arranged along the length direction of the first isolation plate and are positioned on one side of the first isolation plate, which is far away from the second isolation plate; each battery is provided with a positive electrode and a negative electrode, the positive electrode of each battery is clamped into each first upper hole and each first lower hole, and the negative electrode of each battery is clamped into each second upper hole and each second lower hole;

the positive electrode bars are arranged on one side, far away from the first isolating plate, of the second isolating plate, correspond to the positive electrodes one by one and are electrically connected with the positive electrodes, and the positive electrode bars are connected in series;

the negative electrode bars are arranged on one side, far away from the first isolating plate, of the second isolating plate, correspond to the negative electrodes one by one and are electrically connected with the negative electrodes, and the negative electrode bars are mutually connected in series;

the separator assembly, the batteries, the positive electrode bars and the negative electrode bars are all positioned in the shell;

the positive output electrode is arranged on the shell and exposed outside the shell, and the positive output electrode is electrically connected with each positive electrode piece; and

the negative electrode output electrode is arranged on the shell and exposed outside the shell, and the negative electrode output electrode is electrically connected with the negative electrode strips.

In one embodiment, the explosion-proof valve on each battery is positioned on the side of each battery facing the first separation plate.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings which correspond to and are not to be construed as limiting the embodiments, in which elements having the same reference numeral designations represent like elements throughout, and in which the drawings are not to be construed as limiting in scale unless otherwise specified.

FIG. 1 is an exploded view of a bulkhead assembly in an embodiment of the utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is a top plan view of the separator plate assembly of the present invention;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is an enlarged view at C of FIG. 5;

FIG. 7 is a schematic structural view of a second separator plate according to the present invention;

FIG. 8 is an enlarged view at D of FIG. 7;

fig. 9 is a schematic structural view of a battery pack according to the present invention;

fig. 10 is an exploded view of a battery pack of the present invention;

FIG. 11 is an enlarged view at E in FIG. 10;

fig. 12 is a schematic structural view of a battery in an embodiment of the present invention.

Description of reference numerals:

1. a first separator plate; 11. a first lower hole; 12. a second lower hole; 13. a base plate; 14. a first side plate; 15. a second side plate; 16. a first connecting plate; 17. a second connecting plate; 2. a second separator plate; 21. a first upper hole; 22. a second upper hole; 23. a panel; 24. a frame; 25. a connecting frame; 26. a groove; 3. a hollow cavity; 4. a water pipe; 6. a battery; 61. a positive electrode of the battery; 62. a negative electrode of the battery; 63. an explosion-proof valve; 7. a positive electrode plate; 8. a negative electrode plate; 912. an upper cover; 913. an end plate; 915. an electrode holder; 10. an insulation board assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

A separator plate assembly for fixing a battery strap according to a first embodiment of the present invention will be described below with reference to the accompanying drawings, and in particular, as shown in fig. 1 to 8, a separator plate assembly 10 includes: the structure comprises a first isolation plate 1 and a second isolation plate 2, wherein a group of first lower holes 11 and a group of second lower holes 12 are formed in the first isolation plate 1, and the first lower holes 11 in the group of first lower holes 11 are arranged along the length direction of the first isolation plate 1; each second lower hole 12 of the group of second lower holes 12 is arranged along the length direction of the first partition plate 1, and each second lower hole 12 corresponds to each first lower hole 11 one by one and is spaced apart from each other along the width direction of the first partition plate 1.

The second isolation plate 2 and the second isolation plate 2 are oppositely arranged on the first isolation plate 1, a group of first upper holes 21 and a group of second upper holes 22 are formed in the second isolation plate 2, and the first upper holes 21 in the group of first upper holes 21 are arranged along the length direction of the second isolation plate 2; each second upper hole 22 in the group of second upper holes 22 is arranged along the length of the second isolation plate 2, and each second upper hole 22 and each first upper hole 21 are opposite to each other in the width direction of the second isolation plate 2 in a one-to-one correspondence and are spaced from each other;

wherein, each first upper hole 21 and each first lower hole 11 are correspondingly arranged one by one, and each second upper hole 22 and each second lower hole 12 are correspondingly arranged one by one;

meanwhile, as shown in fig. 4 to 6, at least one central portion of each of the first partition plates 1 and the second partition plates 2 is recessed in a direction away from each other between the first partition plates 1 and the second partition plates 2 to form a sealed hollow cavity 3, and the sealed hollow cavity 3 is operably stored with cooling water.

Because a closed hollow cavity 3 is formed between the first isolation plate 1 and the second isolation plate 2, and cooling liquid is filled in the hollow cavity 3, when the isolation plate assembly 10 fixes the battery piece, the battery 6 can be cooled, the occurrence of thermal runaway of a battery pack is reduced, and the safety of the battery pack is improved.

Specifically, as shown in fig. 6, the partition board assembly 10 further includes a water pipe 4, and the water pipe 4 is disposed on the first partition board 1 or the second partition board 2 and is communicated with the hollow cavity 3. Preferably, the water pipe 4 is provided on one side in the longitudinal direction of the first or second separator plate 1 or 2. The cooling liquid in the hollow cavity 3 can be discharged through the water pipe 4, and the cooling liquid can also be injected into the hollow cavity 3.

In addition, specifically, as shown in fig. 2 and 8, a plurality of grooves 26 are formed in a side of the second partition plate 2 away from the first partition plate 1, each groove 26 corresponds to one first upper hole 21 or one second upper hole 22, and each first upper hole 21 and each second upper hole 22 form a groove bottom of the corresponding groove 26. In addition, in order to prevent the coolant from flowing into the positive electrode of the battery 6 and the negative electrode of the battery 6, the groove bottom of the groove 26 is closely attached to the first separator 1.

Preferably, a part of adjacent two of the grooves 26 communicates. In this embodiment, the tabs of the battery pack are located in each recess 26, which facilitates the securing of the tabs.

Specifically, as shown in fig. 1 to 8, the second isolation plate 2 includes a face plate 23, a side frame 24 and a connection frame 25, the face plate 23 is disposed opposite to the first isolation plate 1, and each first upper hole 21 and each second upper hole 22 are opened on the face plate 23; the frame 24 is coaxially and fixedly connected with the panel 23, and the axial direction of the frame 24 extends from the panel 23 to the first isolation plate 1; the connecting frame 25 and the frame 24 are far away from the coaxial fixed connection on one side of the panel 23, and the connecting frame 25 and the first isolation plate 1 are connected in a sealing mode to form the hollow cavity 3. Meanwhile, the first separator 1 includes: the bottom plate 13 is arranged opposite to the panel 23, and each first upper hole 21 and each second upper hole 22 are formed in the bottom plate 13; the first side plate 14 and the second side plate 15 are oppositely arranged at two sides of the bottom plate 13 in the length direction, and both the first side plate 14 and the second side plate 15 extend from the bottom plate 13 direction to the panel 23 direction; the first connecting plate 16 is arranged at one end of the first side plate 14 far away from the bottom plate 13, and is fixedly connected with the connecting frame 25; the second connecting plate 17 is disposed at one end of the second side plate 15 far away from the bottom plate 13, and is fixedly connected to the connecting frame 25.

In addition, as shown in fig. 5 and 6, the groove bottom of the groove 26 of the second isolation plate 2 is tightly attached to the bottom plate 13.

Specifically, as shown in fig. 6, the water pipe 4 is provided on the frame 24 of the second partition plate 2.

Of course, it should be noted that in some embodiments, the first partition board 1 and the second partition board 2 may be only two parallel side boards, and the central area of the first partition board 1 is recessed toward the area away from the second partition board 2, and the central area does not radiate to the first lower hole 11 and the second lower hole 12. The structure of the second isolation plate 2 is symmetrical to that of the first isolation plate 1, the first isolation plate 1 and the second isolation plate 2 are arranged oppositely, and the concave parts of the first isolation plate 1 and the second isolation plate 2 are spliced together to form the hollow cavity 3.

As shown in fig. 10 to 12, the side of the first separator 1 away from the second separator 2 is disposed toward the explosion-proof valve 63 of the battery 6, the first separator is made of an insulating non-metallic material, preferably PC, PET, or the like, and has a thickness of 0.2 to 0.8mm, preferably 0.3 to 0.6 mm. Therefore, when thermal runaway occurs in the battery 6, the battery 6 generates high-speed airflow, and the high-speed airflow can break through the first separation plate 1, so that the coolant in the first separation plate 1 flows into the thermal runaway battery 6, and fire is prevented from happening.

Specifically, in the present embodiment, as shown in fig. 12, the explosion-proof valve 63 is located on the upper surface of the battery 6, and the partition plate assembly 10 is also located on the upper surface of each battery 6, and the first partition plate 1 is disposed adjacent to the upper surface of each battery 6.

The second embodiment of the present invention also provides a battery pack, as shown in fig. 9 to 11, including: the separator assembly 10, the plurality of batteries 6, the plurality of positive electrode bars 7 and the plurality of negative electrode bars 8 in the first embodiment are arranged in the length direction of the first separator 1, and each battery 6 is located on the side of the first separator 1 away from the second separator 2; each of the batteries 6 has a positive electrode and a negative electrode, the positive electrode of each of the batteries 6 is inserted into each of the first upper holes 21 and the first lower holes 11, and the negative electrode of each of the batteries 6 is inserted into each of the second upper holes 22 and the second lower holes 12. Each positive electrode piece 7 is arranged on one side of the second isolation plate 2 far away from the first isolation plate 1, each positive electrode piece 7 is electrically connected with each positive electrode in a one-to-one correspondence mode, and the positive electrode pieces 7 are connected in series. Specifically, as shown in fig. 10 and 11, each positive electrode tab 7 is fitted into a groove 26 provided coaxially with the first upper hole 21. Each negative electrode bar 8 is disposed on one side of the second isolation plate 2 away from the first isolation plate 1, each negative electrode bar 8 is electrically connected to each negative electrode one by one, and each negative electrode bar 8 is connected in series. Specifically, as shown in fig. 10 and 11, each negative electrode tab 8 is fitted into a groove 26 provided coaxially with the second upper hole 22.

In addition, as shown in fig. 9 to 11, the battery pack further includes: the housing, the positive output pole and the negative output pole can be placed in the housing after the separator assembly 10, the battery 6 and the positive electrode strips 7 and the negative electrode strips 8 are installed. The positive output electrode is arranged on the shell and exposed outside the shell, and the positive output electrode is electrically connected with each positive electrode piece 7; the negative output electrode is arranged on the shell and exposed outside the shell, and the negative output electrode is electrically connected with each negative bar piece 8.

Specifically, the positive electrode tabs 7 are connected in series and then electrically connected to the positive electrode output electrode, so that the positive electrode output electrode is the positive electrode of the entire battery pack. Meanwhile, since the negative electrode bars 8 are connected in series and then electrically connected to the negative electrode output electrode, the negative electrode output electrode is the negative electrode of the entire battery pack.

Specifically, as shown in fig. 9 to 11, the housing includes: the bottom and the top cover 912, which are oppositely arranged, also include: a pair of opposite end plates 913 and a pair of opposite side plates, the pair of end plates 913 and the pair of side plates are connected end to enclose a frame of the housing, and the lower bottom and the upper cover 912 are oppositely arranged along the axial direction of the frame to seal the upper and lower ends of the frame. Meanwhile, the battery pack further includes an electrode holder 915 provided on the end plate 913, and both the positive output electrode and the negative output electrode are provided on the electrode holder 915 so as to be electrically connected to an external circuit.

Of course, it should be noted that sometimes the battery pack is directly exposed in the electric device, and therefore the outer case may also include only a pair of end plates 913 and an upper cover 912 without the side plates and the bottom plate 13, for example, in the present embodiment, the outer case has only a pair of end plates 913 and an upper cover 912.

Preferably, as shown in fig. 12, the explosion-proof valve 63 of each battery 6 is located on the side of each battery 6 facing the first separator 1, and specifically, the separator assembly 10 is provided on the upper surface of each battery 6, while the positive electrode of the battery 6, the negative electrode of the battery 6, and the explosion-proof valve 63 are located on the upper surface of the battery 6.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

The respective embodiments correspond to each other, and therefore the respective embodiments are implemented in cooperation with each other. Related technical details mentioned in one embodiment are still valid in other embodiments, and technical effects that can be achieved in one embodiment can also be achieved in other embodiments, and are not described herein again in order to reduce repetition. Accordingly, the relevant technical details mentioned in one embodiment may also be applied in other embodiments.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims (10)

1. A separator plate assembly for securing a battery strap, the separator plate assembly comprising:

the first isolation plate is provided with a group of first lower holes and a group of second lower holes, and the first lower holes in the group of first lower holes are arranged along the length direction of the first isolation plate; each second lower hole in the group of second lower holes is arranged along the length direction of the first isolation plate, is opposite to each first lower hole in a one-to-one correspondence manner along the width direction of the first isolation plate and is mutually separated; and

the second isolation plate and the second isolation plate are oppositely arranged on the first isolation plate, a group of first upper holes and a group of second upper holes are formed in the second isolation plate, and the first upper holes in the group of first upper holes are arranged along the length direction of the second isolation plate; each second upper hole in the group of second upper holes is arranged along the length of the second isolation plate, is opposite to each first upper hole in a one-to-one correspondence manner along the width direction of the second isolation plate and is mutually separated;

each first upper hole and each first lower hole are correspondingly arranged one by one, and each second upper hole and each second lower hole are correspondingly arranged one by one;

at least one central part of each first isolation plate and each second isolation plate is inwards concave towards the direction away from each other and is formed into a closed hollow cavity between the first isolation plate and the second isolation plate, and cooling water is stored in the closed hollow cavity in an operable mode.

2. The separator assembly for securing a battery strap of claim 1, further comprising a water tube disposed on the first separator or the second separator and in communication with the hollow cavity.

3. The separator assembly for securing a battery strap according to claim 2, wherein the water pipe is provided at one side in a length direction of the first separator or the second separator.

4. The separator assembly according to claim 1, wherein a side of the second separator plate away from the first separator plate defines a plurality of recesses, each recess corresponding to one of the first upper holes or one of the second upper holes, and each of the first upper holes and each of the second upper holes defines a groove bottom corresponding to the respective recess;

wherein, the tank bottom of recess and first division board sealing connection.

5. The separator assembly for securing a battery strap according to claim 4, wherein some adjacent two of the grooves communicate.

6. The separator plate assembly for securing a battery strap according to claim 4, wherein the second separator plate comprises:

the panel is arranged opposite to the first isolation plate, and each first upper hole and each second upper hole are formed in the panel;

the side frame is coaxially and fixedly connected with the panel, and the side frame extends from the panel to the direction of the first isolation plate; and

the connecting frame, the connecting frame with the frame is kept away from the coaxial fixed connection in panel one side, the connecting frame with first division board sealing connection forms well cavity.

7. The separator plate assembly for securing a battery strap according to claim 6, wherein the first separator plate comprises:

the bottom plate is arranged opposite to the panel, and each first upper hole and each second upper hole are formed in the bottom plate;

the first side plate and the second side plate are oppositely arranged on two sides of the bottom plate in the length direction, and both the first side plate and the second side plate extend from the bottom plate direction to the panel direction;

the first connecting plate is arranged at one end, far away from the bottom plate, of the first side plate and is fixedly connected with the connecting frame; and

and the second connecting plate is arranged at one end, far away from the bottom plate, of the second side plate and is fixedly connected with the connecting frame.

8. The separator plate assembly for securing a battery strap according to claim 1, wherein a side of the first separator plate remote from the second separator plate is disposed toward an explosion-proof valve of a battery, and a thickness of the first separator plate is 0.2-0.8 mm.

9. A battery pack, comprising:

the separator assembly according to any one of claims 1 to 8;

the batteries are arranged along the length direction of the first isolation plate and are positioned on one side of the first isolation plate, which is far away from the second isolation plate; each battery is provided with a positive electrode and a negative electrode, the positive electrode of each battery is clamped into each first upper hole and each first lower hole, and the negative electrode of each battery is clamped into each second upper hole and each second lower hole;

the positive electrode bars are arranged on one side, far away from the first isolating plate, of the second isolating plate, correspond to the positive electrodes one by one and are electrically connected with the positive electrodes, and the positive electrode bars are connected in series;

the negative electrode bars are arranged on one side, far away from the first isolating plate, of the second isolating plate, correspond to the negative electrodes one by one and are electrically connected with the negative electrodes, and the negative electrode bars are mutually connected in series;

the separator assembly, the batteries, the positive electrode bars and the negative electrode bars are all positioned in the shell;

the positive output electrode is arranged on the shell and exposed outside the shell, and the positive output electrode is electrically connected with each positive electrode piece; and

the negative electrode output electrode is arranged on the shell and exposed outside the shell, and the negative electrode output electrode is electrically connected with the negative electrode strips.

10. The battery pack of claim 9, wherein the explosion-proof valve on each of the cells is located on a side of each of the cells facing the first separator plate.

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