CN220065973U - Battery pack and electricity utilization device - Google Patents

Abstract

The utility model belongs to the technical field of power batteries, and discloses a battery pack and an electric device, wherein the battery pack comprises a box body, a limiting piece, a fixed adhesive layer and a plurality of battery cell groups, and each battery cell group comprises a plurality of battery cells which are stacked; the box body is provided with a containing cavity, the bottom wall of the inside of the containing cavity is provided with a plurality of limit grooves corresponding to the battery cells one by one, and one end of each battery cell is arranged in each limit groove; the limiting piece is arranged on the box body and is provided with a plurality of limiting holes corresponding to the battery cells one by one, and the other end of each battery cell is penetrated through the corresponding limiting hole; the fixed glue layer is arranged on one side of the limiting piece, which is far away from the inner bottom wall of the box body, and the outer peripheral wall surface of the other end of the battery cell can be fixedly connected with the limiting piece. The battery pack can limit the battery cells, ensure the gaps among the battery cells and the fixing effect on the battery cells, improve the fixing reliability of the battery cells, and have the advantages of less glue consumption, light weight and high energy density.

Description

Battery pack and electricity utilization device

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery pack and an electric device.

Background

Currently, in the technical field of power batteries, an electric core is generally divided into a cylindrical electric core, a soft package electric core and a square shell electric core, and in order to improve energy density, the electric core is often fixed in a battery package through gluing so as to reduce the weight of the battery package and improve the energy density of the battery package.

When the conventional cylindrical battery cell is fixed in a battery pack by glue filling, the bottom of the battery cell is fixed, and in the glue filling process, the gap between the battery cells at the bottom of the battery pack possibly meets the design requirement, but the gap between the battery cells at the top of the battery pack has the defect of larger deviation. Therefore, part of the battery packs are provided with external brackets so as to limit the battery cells and ensure the gaps among the battery cells. However, if the glue is too much, the battery cell can be firmly fixed, but the weight is too large; if the glue is too little, then need observe the rubber coating effect to guarantee to fix the electric core, because glue is located the bottom of battery package, be inconvenient for the operation personnel to observe, the condition such as this battery package inefficacy, size disqualification can appear and take place.

Therefore, there is a need to design a battery pack to solve the above-mentioned technical problems.

Disclosure of Invention

The utility model aims to provide a battery pack which can limit electric cores, ensure gaps among the electric cores and the fixing effect of the electric cores, improve the fixing reliability of the electric cores, and has the advantages of less glue consumption, light weight and high energy density.

To achieve the purpose, the utility model adopts the following technical scheme:

a battery pack, comprising:

the battery cell comprises a plurality of battery cells which are stacked;

the battery cell comprises a box body, wherein the box body is provided with a containing cavity, the bottom wall of the inside of the containing cavity is provided with a plurality of limit grooves which are in one-to-one correspondence with the battery cells, and one end of each battery cell is arranged in each limit groove;

the limiting piece is arranged on the box body and is provided with a plurality of limiting holes corresponding to the battery cells one by one, and the other end of each battery cell is penetrated through the corresponding limiting hole;

and the fixed adhesive layer is arranged on one side of the limiting piece, which is far away from the inner bottom wall of the box body, and can fixedly connect the outer peripheral wall surface of the other end of the battery cell with the limiting piece.

Optionally, a via hole is formed at the bottom of the limiting groove, and the battery cell is disposed in the limiting groove and can cover the via hole.

Optionally, the case further includes a plurality of partitions, the partition divides the accommodating cavity into a plurality of accommodating cavities, the battery cell set is disposed in the accommodating cavities, and the limiting member is detachably connected to the partition.

Optionally, the inner side wall surface of the accommodating cavity is provided with a plurality of fixing parts, and the limiting part is detachably connected to the fixing parts.

Optionally, the spacing piece and the partition board, and the spacing piece and the fixing part are all riveted, glued or screwed.

Optionally, a glue containing groove is formed on one side of the limiting piece away from the inner bottom wall of the box body, and the fixing glue layer is arranged in the glue containing groove.

Optionally, the glue containing grooves and the battery cell groups are arranged in a one-to-one correspondence, and fixing grooves are formed between the groove walls of the adjacent glue containing grooves and between the peripheral wall of the limiting piece and the groove wall of the adjacent glue containing groove.

Optionally, a protecting piece is sleeved on the inner peripheral wall surface of the limiting hole, and the protecting piece is abutted to the outer peripheral wall surface of the battery cell.

Optionally, the battery pack further includes a cooling structure disposed in the accommodating cavity and contacting the battery cell.

The utility model further aims to provide an electricity utilization device which comprises the battery pack, wherein the battery pack can limit the battery cells, ensure the gaps among the battery cells and the fixing effect on the battery cells, improve the reliability of fixing the battery cells, and has the advantages of less glue consumption, light weight and high energy density.

The utility model has the beneficial effects that:

the utility model provides a battery pack and an electricity utilization device, wherein a limit groove is formed in the bottom of a box body so as to fix one end of a battery cell; a limiting piece is arranged on the top side of the box body, and a limiting hole on the limiting piece is used for fixing the other end of the battery cell so as to realize the fixation of the battery cell and the control of gaps among a plurality of battery cells; in addition, one side of the limiting piece, which is far away from the inner bottom wall of the box body, is provided with a fixed adhesive layer, so that the other end of the battery cell is fixedly connected with the limiting piece, the battery cell can be firmly connected in the box body, the adhesive consumption is small, the weight of the battery pack is reduced, and the energy density of the battery pack is improved; meanwhile, in the process of placing and forming the fixing adhesive layer, the fixing adhesive layer is arranged at the top of the box body, so that the fixing adhesive layer is convenient for operators to observe, and the fixing effect of the fixing adhesive layer on the battery cells is ensured, namely, the fixing adhesive layers are connected between each battery cell and the limiting piece.

Drawings

Fig. 1 is an isometric view of a battery pack provided in an embodiment of the utility model;

fig. 2 is an exploded view of a battery pack according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a battery pack according to an embodiment of the present utility model;

fig. 4 is an isometric view of a case provided in an embodiment of the present utility model.

In the figure:

10. a cell group; 11. a battery cell;

20. a case; 21. a receiving chamber; 211. a placement cavity; 22. a partition plate; 23. a limit groove; 231. a via hole; 24. a fixing part;

30. a limiting piece; 31. a limiting hole;

40. fixing the adhesive layer; 50. and (5) a bolt.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery pack, and this battery pack can be spacing to electric core 11, guarantees the clearance between the electric core 11 and to the fixed effect of electric core 11, has improved the fixed reliability of electric core 11, and with little, light in weight, the energy density is high.

Specifically, as shown in fig. 1 to 4, the battery pack includes a case 20, a limiting member 30, a fixing adhesive layer 40, and a plurality of battery cell groups 10. The battery cell group 10 comprises a plurality of battery cells 11 which are stacked; the box body 20 is provided with a containing cavity 21, the battery cell group 10 is arranged in the containing cavity 21, the inner bottom wall of the containing cavity 21 is provided with a plurality of limit grooves 23 which are in one-to-one correspondence with the battery cells 11, one end of each battery cell 11 is arranged in each limit groove 23 so as to limit one end of each battery cell 11, and the gaps among the battery cells 11 facing one end of the inner bottom wall of the containing cavity 21 meet preset requirement values; and, the locating part 30 sets up on box 20, and locating part 30 is equipped with a plurality of spacing holes 31 that correspond with electric core 11 one by one, and spacing hole 31 is worn to locate by the other end of electric core 11 to carry out spacing to the other end of electric core 11, make the clearance between each electric core 11 of the one end of keeping away from the inside diapire of holding chamber 21 satisfy the requirement value of predetermineeing.

Further, the fixed adhesive layer 40 is arranged on one side of the inner bottom wall of the box body 20, which is far away from the limiting piece 30, and can fixedly connect the outer peripheral wall surface of the other end of the battery cell 11 with the limiting piece 30, so that the battery cell 11 can be fixed, the fixed adhesive layer 40 is only positioned on one side of the limiting piece 30, which is far away from the inner bottom wall of the box body 20, the adhesive content of the fixed adhesive layer 40 is less, and meanwhile, when the fixed adhesive layer 40 is solidified, operators can observe the amount of the adhesive layer and the fixation of the battery cell 11 at any time, so as to ensure that the fixed adhesive layer 40 can firmly fix the battery cell 11 and the limiting piece 30.

The battery pack in the embodiment is provided with the limit groove 23 at the bottom of the box body 20 so as to fix one end of the battery cell 11; a limiting piece 30 is arranged on the top side of the box body 20, and a limiting hole 31 on the limiting piece 30 is used for fixing the other end of the battery cell 11 so as to realize the fixation of the battery cell 11 and the control of gaps among the battery cells 11; in addition, one side of the limiting piece 30, which is far away from the inner bottom wall of the box body 20, is provided with a fixed adhesive layer 40, so that the other end of the battery cell 11 is fixedly connected with the limiting piece 30, the battery cell 11 is further ensured to be firmly connected in the box body 20, the adhesive consumption is small, the weight of a battery pack is reduced, and the energy density of the battery pack is improved; meanwhile, in the process of placing and forming the fixing adhesive layer 40, the fixing adhesive layer is arranged at the top of the box body 20, so that the fixing adhesive layer 40 is convenient for operators to observe, and the fixing effect of the fixing adhesive layer 40 on the battery cells 11 is ensured, namely, the fixing adhesive layers 40 are connected between each battery cell 11 and the limiting piece 30.

Optionally, the structural adhesive selected for the fixing adhesive layer 40 has a certain structural strength, so that the fixing of the battery cell 11 is ensured, and the strength of the battery pack is improved.

Further alternatively, the structural adhesive with higher viscosity is selected, so that the risk of the structural adhesive flowing everywhere in the battery pack is reduced, and the adhesive consumption is reduced.

In this embodiment, as shown in fig. 2 to 4, the bottom of the above-mentioned limit groove 23 is provided with a via hole 231, the electric core 11 is disposed in the limit groove 23 and can cover the via hole 231, the via hole 231 is configured to dissipate heat and exhaust the electric core 11 in the battery pack, after a certain electric core 11 is thermally out of control, the injection direction of the electric core 11 is mainly concentrated on the pole side and bottom end of the electric core 11, and through the above-mentioned configuration, the release of heat to the electric core 11 can be well realized, the thermal spread is greatly slowed down, and the safety of the battery pack is improved.

Further, the above-mentioned box 20 still includes a plurality of baffle 22, and baffle 22 will hold chamber 21 and separate into a plurality of and settle chamber 211, and electric core group 10 sets up in settling chamber 211, and it sets up electric core group 10 separately, i.e. places the electric core 11 group in the whole battery package, and the installation of being convenient for, and separates setting up a plurality of electric core group 10 through a plurality of settling chamber 211, has protected electric core group 10, after avoiding electric core 11 in an electric core group 10 to appear the problem, influences another electric core group 10, has improved the security of this battery package.

Optionally, the limiting member 30 is detachably connected to the partition 22, so that the positioning and fixing of the limiting member 30 can be achieved.

Further, the inner side wall surface of the accommodating cavity 21 is provided with a plurality of fixing portions 24, and the limiting member 30 is detachably connected to the fixing portions 24, so that the limiting plate can be further positioned and fixed.

Alternatively, the distance between the top of the partition 22 and the bottom wall of the accommodating chamber 21 is the same as the distance between the top of the fixing portion 24 and the bottom wall of the accommodating chamber 21, so that the case 20 and the mounting surface of the stopper 30 are ensured to be in the same plane.

It should be understood that any detachable connection between the stopper 30 and the partition 22 and between the stopper 30 and the fixing portion 24 may be used, and is not particularly limited herein.

Illustratively, the riveting connection, the cementing connection or the threaded connection between the limiting piece 30 and the partition 22 and between the limiting piece 30 and the fixing portion 24 can realize the detachable connection between the limiting piece 30 and the partition 22 and the detachable connection between the limiting piece 30 and the fixing portion 24, so as to facilitate the subsequent disassembly; the connecting mode is simple and easy to operate, and the cost is low.

In this embodiment, the spacing member 30 is threaded with the partition 22, and the spacing member 30 is threaded with the fixing portion 24. Specifically, the battery pack further includes bolts 50, the partition 22 and the fixing portion 24 are respectively provided with a threaded hole, the limiting member 30 is provided with a mounting hole, and the bolts 50 penetrate through the mounting holes and are in threaded connection with the threaded holes, so that detachable connection between the limiting member 30 and the partition 22 and detachable connection between the limiting member 30 and the fixing portion 24 can be achieved.

In order to locate the fixing adhesive layer 40, in this embodiment, a plurality of adhesive accommodating grooves (not shown in the drawings) are disposed on one side of the limiting member 30 away from the inner bottom wall of the case 20, the fixing adhesive layer 40 is disposed in the adhesive accommodating grooves, and an accommodating space of the fixing adhesive layer 40 is provided, so that the fixing adhesive layer 40 is prevented from flowing to other positions in an uncured state, and damage to structures at other positions is avoided.

Further, hold gluey groove and electric core group 10 one-to-one and be provided with a plurality ofly, between the cell wall in adjacent hold gluey groove, and the periphery wall in locating part 30 and rather than between the cell wall in adjacent hold gluey groove form the fixed slot, the fixed slot is used for giving the fixed knot of locating part 30 and box 20 and constructs with the accommodation space, after having avoided this locating part 30 and box 20 fixed, the fixed knot of fixed glue film 40's setting makes the fixed knot to construct, and then avoid causing this battery package later stage unable dismantlement maintenance, need change the high problem of cost of maintenance with whole battery package, the cost of maintenance of this battery package has been reduced, and maintenance efficiency has been improved.

Still further, the inner peripheral wall surface of the limiting hole 31 is sleeved with a protecting piece (not shown in the figure), the protecting piece is abutted to the outer peripheral wall surface of the battery cell 11, the inner peripheral wall of the limiting hole 31 is prevented from being scratched and damaged on the outer peripheral wall surface of the battery cell 11 by the protecting piece, the protecting effect on the battery cell 11 is improved, and the protecting piece is abutted to the outer peripheral wall surface of the battery cell 11, so that no gap exists between the inner peripheral wall surface of the limiting hole 31 and the outer peripheral wall surface of the battery cell 11, and the fixing adhesive layer 40 cannot flow into the accommodating cavity 211 through the limiting hole 31 in a position solidification state, and pollution to the inside of the battery pack is avoided.

In order to realize temperature control of the battery pack, in this embodiment, the battery pack further includes a cooling structure (not shown in the figure), the cooling structure is disposed in the accommodating cavity 21 and contacts with the battery core 11, and the setting of the cooling structure can realize temperature control of the battery core 11, so as to ensure normal operation of charging and discharging of the battery pack.

The embodiment also provides an electricity consumption device, which comprises the battery pack according to any one of the above schemes, and the electricity consumption device can be a structure of a battery pack for a battery plug box, an automobile, a ship, an energy storage device and the like, and has all effects of the battery pack, and is not repeated herein.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A battery pack, comprising:

the battery cell assembly comprises a plurality of battery cell groups (10), wherein each battery cell group (10) comprises a plurality of battery cells (11) which are stacked;

the battery pack comprises a box body (20), wherein the box body (20) is provided with a containing cavity (21), the inner bottom wall of the containing cavity (21) is provided with a plurality of limit grooves (23) which are in one-to-one correspondence with the battery cells (11), and one end of each battery cell (11) is arranged in each limit groove (23);

the limiting piece (30), the limiting piece (30) is arranged on the box body (20), the limiting piece (30) is provided with a plurality of limiting holes (31) corresponding to the battery cells (11) one by one, and the other end of the battery cell (11) is penetrated through the limiting holes (31);

the fixing adhesive layer (40), the fixing adhesive layer (40) set up in the locating part (30) keep away from one side of the inside diapire of box (20), and can with the periphery wall of electric core (11) other end with locating part (30) fixed connection.

2. The battery pack according to claim 1, wherein the bottom of the limit groove (23) is provided with a via hole (231), and the battery cell (11) is arranged in the limit groove (23) and can cover the via hole (231).

3. The battery pack according to claim 1, wherein the case (20) further includes a plurality of separators (22), the separators (22) divide the accommodating chamber (21) into a plurality of accommodating chambers (211), the battery cell group (10) is disposed in the accommodating chambers (211), and the stopper (30) is detachably connected to the separators (22).

4. A battery pack according to claim 3, wherein the inner side wall surface of the accommodating chamber (21) is provided with a plurality of fixing portions (24), and the stopper (30) is detachably connected to the fixing portions (24).

5. The battery pack according to claim 4, wherein the stopper (30) and the separator (22) and the stopper (30) and the fixing portion (24) are connected by riveting, cementing or screwing.

6. The battery pack according to any one of claims 1-5, wherein a glue containing groove is formed in a side of the limiting member (30) away from the inner bottom wall of the case (20), and the fixing glue layer (40) is disposed in the glue containing groove.

7. The battery pack according to claim 6, wherein the glue containing grooves and the cell groups (10) are provided in one-to-one correspondence, and fixing grooves are formed between the groove walls of the adjacent glue containing grooves and between the peripheral walls of the limiting members (30) and the groove walls of the adjacent glue containing grooves.

8. The battery pack according to any one of claims 1 to 5, wherein the inner peripheral wall surface of the limiting hole (31) is sleeved with a guard, and the guard abuts against the outer peripheral wall surface of the battery cell (11).

9. The battery pack according to any one of claims 1-5, further comprising a cooling structure disposed within the receiving cavity (21) and in contact with the cells (11).

10. An electrical device comprising a battery pack according to any one of claims 1-9.