CN221150191U - Power battery with precious cover structure - Google Patents

Abstract

The utility model belongs to the technical field of power batteries, and discloses a power battery with a precious cover structure, wherein the power battery comprises a shell, and two sides of the shell in the length direction are designed in an opening mode; the partition plate is arranged in the shell along the direction parallel to the opening of the shell and divides the shell into at least two battery cell accommodating cavities; wherein, the end parts of the baffle plates, which are close to the openings of the shell bodies at the two sides, are flush with the plane where the openings are positioned; the battery cell body comprises a plurality of battery cell bodies which are respectively arranged in the battery cell accommodating cavity; the cover plate assembly comprises a positive electrode cover assembly and a negative electrode cover assembly which are respectively connected with the outer side wall of the opening in a covering mode, the end portions, close to the openings on the two sides of the shell, of the partition plates are arranged in a flush mode with the plane where the openings are located, the positive electrode cover assembly and the negative electrode cover assembly are respectively connected with the outer side wall of the openings on the two sides of the shell in a covering mode, the installation process of the cover plate assembly is simplified through the structural design, steps and complexity in the installation process are reduced, accordingly time and labor cost required for installation are saved, and meanwhile installation speed and efficiency can be improved through the installation process.

Description

Power battery with precious cover structure

Technical Field

The utility model relates to the technical field of power batteries, in particular to a power battery with a precious cover structure.

Background

With the development of new energy industry, more and more power batteries are applied to automobiles, and the traditional power batteries generally adopt a single-end-to-end design, and the design has some limitations, including problems of application scene limitation, current imbalance, increased safety risk and the like.

In the power battery technology of the existing double-end head structure, a baffle is usually arranged in an aluminum shell independently, side covers at two ends are arranged on the same plane as openings at two sides of the shell, a clamping groove is further formed in the shell, the baffle is inserted into the groove, the baffle is inserted into the clamping groove correspondingly installed in the shell, and after the side covers at two ends are welded and fixed with the outer side walls of the openings at two sides of the shell respectively, like the design, the installation process is complex, the structural stability of the shell is not high, and the cost is also not reduced.

Disclosure of utility model

The utility model mainly aims to provide a power battery with a precious cover structure, and aims to solve the problem that a side cover assembly of the power battery with a double-end-head structure is complex in mounting process.

In order to achieve the above object, an aspect of the present utility model provides a power battery with a cap structure, including:

the shell, the both sides of said shell length direction are open-ended design;

The separator is arranged in the shell along the direction parallel to the opening of the shell and divides the shell into at least two battery cell accommodating cavities; the end parts, close to the openings of the two sides of the shell, of the partition plates are flush with the plane where the openings are located;

the battery cell body comprises a plurality of battery cell bodies which are respectively arranged in the battery cell accommodating cavity;

The cover plate assembly comprises a positive electrode cover assembly and a negative electrode cover assembly, and the positive electrode cover assembly and the negative electrode cover assembly are respectively connected to the outer side wall of the opening in a covering mode.

Further, the positive electrode cover assembly comprises a first side shell upper cover and a first side shell lower cover, wherein the first side shell lower cover is positioned between the first side shell upper cover and the battery cell body, the first side shell upper cover is fixedly connected with the first side shell lower cover, and the first side shell upper cover is connected with the opening side wall.

Further, the negative electrode cover assembly comprises a second side shell upper cover and a second side shell lower cover, wherein the second side shell upper cover is positioned between the second side shell upper cover and the battery cell body, the second side shell upper cover is fixedly connected with the second side shell lower cover, and the second side shell upper cover is connected with the side wall of the opening.

Further, insulating strips are arranged on two sides of the length direction of the partition plate and close to one side of the cover plate assembly.

Further, the shell is provided with mounting openings which are respectively communicated with different battery cell accommodating cavities, and the mounting openings are provided with explosion-proof pieces.

Further, the battery cell further comprises a connector plate and a pole, wherein the cover plate assembly is provided with a mounting hole, the pole is mounted in the mounting hole, a first side face of the connector plate is connected with the pole, and a second side face of the connector plate opposite to the first side face is connected with the pole lug of the battery cell body.

Further, the tab includes a positive tab and a negative tab, the connector plate includes a copper connector plate and an aluminum connector plate, the copper connector plate connects the positive tab in parallel, and the aluminum connector plate connects the negative tab in parallel.

Further, the post includes positive pole post and negative pole post, negative pole post fixed mounting in on the negative pole lid subassembly, positive pole post fixed mounting in on the positive pole lid subassembly, positive pole post with copper connector board is connected, negative pole post with aluminum connector board is connected.

Further, at least one electric core body is arranged in each electric core accommodating cavity, and each electric core body at least comprises two electric cores.

Further, an outer insulating layer is provided on the housing peripheral side.

Further, the battery cell is wrapped by an insulating film to separate the battery cell from the housing.

Further, the housing and the partition are integrally formed.

Further, the side wall of the mounting hole is provided with a sealing ring.

The beneficial effects are that:

The utility model relates to a power battery with a treasured cover structure, which comprises a shell, wherein two sides of the shell in the length direction are designed in an opening mode; the separator is arranged in the shell along the direction parallel to the opening of the shell and divides the shell into at least two battery cell accommodating cavities; the end parts, close to the openings of the two sides of the shell, of the partition plates are flush with the plane where the openings are located; the battery cell body comprises a plurality of battery cell bodies which are respectively arranged in the battery cell accommodating cavity; the cover plate assembly comprises an anode cover assembly and a cathode cover assembly, which are respectively connected with the outer side wall of the opening, the two sides of the shell are in an opening design, the baffle plate is arranged in the shell along the direction parallel to the opening of the shell, the shell is divided into at least two battery core accommodating cavities for accommodating battery cores by the baffle plate, wherein the end parts of the two sides of the baffle plate, which are close to the openings, are flush with the plane where the openings are, the cover plate assembly comprises the anode cover assembly and the cathode cover assembly, the anode cover assembly and the cathode cover assembly are respectively connected with the outer side wall of the opening on the two sides of the shell, the skirt edges are respectively arranged on the periphery of the anode cover assembly and the cathode cover assembly, and when the cover plate assembly is installed with the shell, the skirt edges are abutted with the outer side wall of the opening on the two sides of the shell, so that the cover plate assembly is connected with the outer side wall of the opening of the shell by the cover plate assembly by the baffle plate assembly.

Drawings

Fig. 1 is an exploded view of a power cell of a cap structure according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a power cell of the lid construction of an embodiment of the present utility model;

FIG. 3 is a partial view of a power cell of the lid construction of an embodiment of the present utility model;

FIG. 4 is a schematic diagram showing the overall structure of a power cell with a lid structure according to an embodiment of the present utility model;

Wherein:

1. A housing; 11. a mounting port;

2. a partition plate; 21. an insulating strip;

3. A cell receiving cavity; 31. a cell body; 311. an insulating film;

4. A cover plate assembly; 41. a positive electrode cap assembly; 411. a first side case upper cover; 412. a first side case lower cover; 42. a negative cap assembly; 421. a second side case upper cover; 422. a second side case lower cover; 423. a mounting hole; 43. a skirt edge;

5. An explosion-proof member;

61. An aluminum connector plate; 62. a copper connector plate;

71. A cathode post; 72. an anode post; 73. a seal ring;

81. a positive electrode tab; 82. a negative electrode ear;

9. An outer insulating layer;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless specifically defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

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.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a power battery of a cap structure, comprising:

the shell 1, the two sides of the shell 1 in the length direction are of an open type design;

A partition plate 2 provided in the housing 1 in a direction parallel to the opening of the housing 1, dividing the housing 1 into at least two cell accommodation chambers 3; wherein, the end parts of the baffle plates 2, which are close to the openings of the shell 1 at two sides, are flush with the plane of the openings;

the battery core body 31 comprises a plurality of battery core bodies which are respectively arranged in the battery core accommodating cavity 3;

The cover plate assembly 4 includes a positive electrode cover assembly 41 and a negative electrode cover assembly 42, which are respectively connected to the outer side walls of the openings.

In the application, a shell 1 is rectangular, two sides of the shell 1 are provided with openings, a baffle plate 2 is arranged in the shell 1, the baffle plate 2 is arranged in the shell 1 along the direction parallel to the opening of the shell 1, the shell 1 is divided into at least two electric core accommodating cavities 3 for accommodating electric cores 31 by the baffle plate 2, wherein the ends of the baffle plate 2 close to the openings at two sides of the shell 1 are arranged in parallel with the plane where the openings are positioned, a cover plate assembly 4 comprises a positive cover assembly 41 and a negative cover assembly 42, the positive cover assembly 41 and the negative cover assembly 42 are respectively covered on the outer side walls of the openings at two sides of the shell 1, and particularly, the peripheral edges of the positive cover assembly 41 and the negative cover assembly 42 are respectively provided with a skirt edge 43, when the positive cover assembly 41 and the negative cover assembly 42 are installed with the shell 1, the inner walls 43 of the skirt 43 of the positive cover assembly 41 and the negative cover assembly 42 are respectively abutted against the outer side walls of the openings at two sides of the shell 1, and the cover plate assembly 4 is arranged, the end parts close to the openings at two sides of the shell 1 are in parallel to the plane where the openings are positioned, namely the cover plate assembly 4 is covered on the outer side walls of the shell 1, so that the design of the structure is simplified and the installation time is also required, the installation time is reduced, and the installation time is also complicated; correspondingly, the power battery with the double-end head can be powered by the positive electrode and the negative electrode through the two output ports, so that the power battery is more flexible in equipment connection or application, and is suitable for various circuit configurations and connection requirements; accordingly, the double-ended power cells may provide better current splitting and voltage balancing than single-ended power cells, reducing the risk of over-current and overheating. This contributes to improvement in safety and stability of the battery system; in practical application, a single-end-head or double-end-head power battery can be selected according to application requirements and application scenes.

In one embodiment, the positive electrode cap assembly 41 includes a first side case upper cover 411 and a first side case lower cover 412, the first side case lower cover is located between the first side case upper cover 411 and the battery cell 31, the first side case upper cover 411 is fixedly connected with the first side case lower cover 412, and the first side case upper cover 411 is connected to the opening side wall.

The positive electrode cap assembly 41 comprises a first side shell lower cover 412 and a first side shell upper cover 411, wherein the first side shell lower cover 412 is positioned between the first side shell upper cover 411 and the battery cell 31, the first side shell lower cover 412 is fixedly connected with the first side shell upper cover 411, and the first side shell upper cover 411 is welded with the side wall of the shell 1; the main purpose of the arrangement is that the first side case upper cover 411 is a part of the outer case of the power battery based on the battery safety and performance aspects, and if there is no insulator isolation, the first side case upper cover 411 may directly contact the battery cell 31, resulting in a short circuit of the battery. The first side case lower cover 412 is made of an insulating material, so that the situation can be effectively prevented, and the safety of the battery is improved; the purpose of setting the first side case upper cover 411 is to fix the battery cell 31 and the first side case lower cover 412 in the case 1, so that the structure of the power battery is more stable.

Referring to fig. 1 and 3, the negative electrode cap assembly 42 includes a second side case upper cover 421 and a second side case lower cover 422, the second side case upper cover 421 is fixedly connected to the second side case lower cover 422, the second side case lower cover 422 is located between the second side case upper cover 421 and the battery cell 31, and the second side case upper cover 421 is fixedly mounted on the opening sidewall.

In one embodiment, the negative electrode cap assembly 42 includes a second side case lower cover 422 and a second side case upper cover 421, the second side case lower cover 422 is located between the second side case upper cover 421 and the battery cell 31, the second side case lower cover 422 is fixedly connected with the second side case upper cover 421, and the second side case upper cover 421 is welded with the side wall of the case 1, in the present application, the second side case lower cover 422 is plastic PP, which has an insulating function, and adopts an injection molding process; the main purpose of the arrangement is that the second side case upper cover 421 is a part of the outer case of the power battery based on the battery safety and performance aspects, and if there is no insulator isolation, the second side case upper cover 421 may directly contact the battery cell 31, resulting in a short circuit of the battery. The second side case lower cover 422 is made of an insulating material, so that the occurrence of the situation can be effectively prevented, and the safety of the battery is improved; the second side case upper cover 421 is provided to fix the battery cell 31 and the second side case lower cover 422 in the case 1, so that the structure of the power battery is more stable.

In one embodiment, referring to fig. 1 to 4, insulating strips 21 are disposed on both sides of the spacer 2 in the length direction near the side of the cover plate assembly 4.

The insulating strips 21 are arranged on two sides of the separator 2 in the length direction and close to one side of the positive electrode cover assembly 41 and one side of the negative electrode cover assembly 42, the insulating strips 21 are made of plastic PP, the insulating strips 21 are arranged to space the electric core bodies 31 in the electric core accommodating cavity 3 and prevent lugs in adjacent cavities from contacting, in the power battery, the insulating strips 21 are arranged between two adjacent electric core bodies 31 in the shell 1 mainly to prevent short circuits between the electric core bodies 31, if the insulating strips 21 are not isolated between the adjacent electric core bodies 31, direct contact can occur to cause the short circuits, meanwhile, the safety can be improved, the insulating strips 21 play an isolating role, and the direct contact between the electric core bodies 31 can be reduced, so that the potential fault risk is reduced. This contributes to improvement in the safety performance of the power battery.

In one embodiment, the housing 1 is provided with mounting ports 11, the mounting ports 11 are respectively communicated with different battery cell accommodating cavities 3, and the mounting ports 11 are provided with explosion-proof pieces 5.

The explosion-proof piece 5 is arranged on the shell 1, the shell 1 is provided with a mounting opening 11, the explosion-proof piece 5 is arranged on the mounting opening 11, the mounting opening 11 is respectively communicated with different battery cell accommodating cavities 3, the explosion-proof piece 5 is shared by a plurality of battery cell accommodating cavities 3, and the purpose of the explosion-proof piece 5 is to guarantee the safety of a power battery, and high-energy chemical substances are stored in the body. In extreme cases, such as over-charge and over-discharge of the battery, failure of the battery interior, or external impact to the battery, excessive pressure may be generated inside the battery. If such pressure cannot be released, serious accidents such as explosion or combustion of the battery may be caused. The setting of explosion-proof spare 5 can in time deal with the heat dissipation that is steep under the battery thermal runaway condition, and when the battery took place thermal runaway, the inside temperature of battery risees, and atmospheric pressure increases, and when atmospheric pressure reached the pressure value of the thin wall shell trace of casing 1, gas was directly spouted from thin wall shell trace, realizes directional explosion to reach directional blasting's purpose, greatly guaranteed the safety and stability of battery.

In one embodiment, the power battery with the treasured cover structure further comprises a connector plate and a pole, the cover plate assembly 4 is provided with a mounting hole 423, the pole is mounted in the mounting hole 423, a first side surface of the connector plate is connected with the pole, and a second side surface of the connector plate opposite to the first side surface is connected with the pole lug of the electric core 31.

The power battery with the treasured cover structure further comprises a connector plate and a pole, wherein the positive electrode cover assembly 41 and the negative electrode cover assembly 42 are respectively provided with a mounting hole 423 for mounting the pole, a first side face of the connector plate is connected with the pole, one side of a second side face of the connector plate opposite to the first side face is welded with the pole lug of the battery core body 31, and the purpose of the arrangement is to reduce the internal resistance of a structural member, further reduce the temperature rise and improve the service life of the power battery.

In one embodiment, the tabs include positive tabs 81 and negative tabs 82, the connector plates include copper connector plates 62 and aluminum connector plates 61, the copper connector plates 62 connect the positive tabs 81 in parallel, and the aluminum connector plates 61 connect the negative tabs 82 in parallel.

The tab comprises a positive tab 81 and a negative tab 82, the connector plate comprises an aluminum connector plate 61 and a copper connector plate 62, the tab comprises the positive tab 81 and the negative tab 82, the aluminum connector plate 61 is connected with the negative tab 82, the negative tab 82 of the battery cell 31 arranged in the battery cell accommodating cavity 3 is connected in parallel by welding, the positive tab 81 of the battery cell 31 arranged in the battery cell accommodating cavity 3 is connected in parallel by welding, and the internal resistance of a structural member can be reduced by adopting parallel connection, so that the temperature rise is reduced, and the service life of the battery is prolonged; in the present application, two sets of aluminum connector plates 61 and copper connector plates 62 are provided, the purpose of the two sets is to connect the tabs of two electric cores 31, in the actual installation state, the copper connector plates 62 and the positive tabs 81 are welded independently, the positive tab 81 of one electric core 31 is welded corresponding to one copper connector plate 62, after the welding of the two sets of copper connector plates 62 corresponding to the positive tabs 81 of two electric cores 31 is completed, the two sets of copper connector plates 62 are welded and integrated onto the positive electrode post 72, and the aluminum connector plates 61 are the same.

In one embodiment, the posts include an anode post 72 and a cathode post 71, the cathode post 71 is fixedly mounted to the negative cap assembly 42, the anode post 72 is fixedly mounted to the positive cap assembly 41, the anode post 72 is connected to the copper connector plate 62, and the cathode post 71 is connected to the aluminum connector plate 61.

The anode post 72 and the cathode post 71 are respectively provided with two groups, the first side shell lower cover 412 is provided with two groups of first mounting positions, the two groups of first mounting positions are respectively correspondingly provided with two groups of anode posts 72, the two groups of anode posts 72 are respectively and fixedly arranged on the first side shell lower cover 412, the second side shell lower cover 422 is provided with two groups of second mounting positions, the two groups of second mounting positions are respectively and correspondingly provided with two groups of cathode posts 71, the two groups of cathode posts 71 are respectively and fixedly arranged on the second side shell lower cover 422, and the two groups of cathode posts 71 and the anode posts 72 are mainly arranged for increasing the overcurrent area, improving the quick charge current carrying capacity of the battery and reducing the concentration effect of temperature; correspondingly, the copper connector plate 62 connected with the anode post 72 and the anode lug 81 is welded in parallel, the aluminum connector plate 61 connected with the cathode post 71 and the cathode lug 82 is welded in parallel, the connection of the anode post 72 and the anode lug 81 and the connection of the cathode post 71 and the cathode lug 82 realize the current output or input of the power battery, and the posts and the lugs are connecting parts between the inside and the outside of the battery and work together to ensure the normal operation and the current transmission of the battery.

In one embodiment, at least one cell body 31 is disposed in each cell accommodating cavity 3, and the cell body 31 includes at least two cells.

In order to realize high energy density, in the application, two groups of electric cores 31 are arranged in one electric core accommodating cavity 3, and one group of electric cores 31 consists of two electric cores

In one embodiment, the housing 1 is provided with an outer insulating layer 9 on the peripheral side.

The outer insulating layer 9 is wrapped on the periphery of the shell 1, wherein the purpose of wrapping the outer insulating layer 9 is to isolate positive and negative cores, direct contact between the positive and negative cores is prevented, and the risk of short circuit is reduced; in addition, the outer insulating layer 9 may also provide additional mechanical protection against external impact and compression of the battery; in the application, the outer insulating layer 9 is designed by adopting a flame-retardant insulating heat-conducting polymer material, and the risk of accidents such as fire or explosion of the battery can be effectively reduced by adopting the polymer material with good flame retardant property, and the threat to the environment and personal safety is reduced; meanwhile, the battery also has better heat conduction performance so as to effectively radiate generated heat and prevent the battery from overheating. Therefore, the flame-retardant, insulating and heat-conducting polymer material is used as the outer insulating layer 9 on the periphery of the battery core, so that the safety of the battery is ensured, and good heat management and insulating performance can be provided.

In one embodiment, the battery cell 31 is provided with an insulating film 311, which separates the battery cell 31 from the housing 1.

The outside of the battery cell 31 is fully wrapped by the insulating film 311, and the battery cell 31 is formed by combining a plurality of groups of battery cells, so the insulating film 311 mainly wraps the battery cell 31, prevents the battery cell 31 from contacting the shell 1 and plays a role in insulation.

In one embodiment, the housing 1 and the partition 2 are integrally formed.

According to the application, the shell 1 is an aluminum shell, the shell 1 and the baffle plate 2 are integrally formed by adopting an aluminum extrusion process to form the battery core accommodating cavity 3, the baffle plate 2 is flush with planes of two ports of the shell 1, the forming process is simple, the baffle plate 2 can be cut into proper sizes according to the required length of the shell 1, the manufacturing process of the baffle plate 13 and the shell 1 can be simplified into one procedure by integrally forming through aluminum extrusion, compared with the prior art, the shell 1 with fixed specification is produced according to fixed indexes, the clamping groove is arranged in the shell 1, the baffle plate 13 is inserted into the clamping groove, the integral forming is followed by cutting according to requirements, the manufacturing efficiency can be remarkably improved, the production cost is reduced, the procedures and the manual operation are reduced, and the obtained structure is firmer and more stable after the baffle plate 13 and the shell 1 are integrally formed through aluminum extrusion, and the service life and the safety of the power battery are improved.

In one embodiment, the mounting hole 423 is provided with a sealing ring 73 on a side wall.

The circumference side wall of the mounting hole 423 for mounting the pole is provided with the sealing ring 73, when the power battery works, the air pressure in the battery cell accommodating cavity 3 is increased, when the air pressure exceeds the interval of 0.9 MPa-1.2 MPa, the air pressure is sprayed out of the explosion-proof piece 5 on the shell, the directional explosion-proof function is realized, the side explosion is prevented, the stability of the power battery structure is improved, the directional explosion-proof is realized, the external environment and the inside of the battery can be effectively isolated, and the performance stability of the battery is improved.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.

Claims (13)

1. A power cell of a treasured cover structure comprising:

the shell, the both sides of said shell length direction are open-ended design;

The separator is arranged in the shell along the direction parallel to the opening of the shell and divides the shell into at least two battery cell accommodating cavities; the end parts, close to the openings of the two sides of the shell, of the partition plates are flush with the plane where the openings are located;

the battery cell body comprises a plurality of battery cell bodies which are respectively arranged in the battery cell accommodating cavity;

The cover plate assembly comprises an anode cover assembly and a cathode cover assembly which are respectively connected with the outer side wall of the opening in a covering manner; the periphery of the positive electrode cover component and the periphery of the negative electrode cover component are respectively provided with a skirt edge, and the skirt edges are abutted to the outer side walls of the openings on the two sides of the shell.

2. The power cell of claim 1, wherein the positive cap assembly comprises a first side cap and a first side cap, the first side cap is positioned between the first side cap and the cell, the first side cap is fixedly connected to the first side cap, and the first side cap is attached to the side wall of the opening.

3. The battery of claim 1, wherein the negative cap assembly comprises a second side cap and a second side cap, the second side cap is located between the second side cap and the cell, the second side cap is fixedly connected to the second side cap, and the second side cap is attached to the side wall of the opening.

4. The power cell of claim 1, wherein insulating strips are provided on the sides of the separator in the longitudinal direction adjacent to the cover plate assembly.

5. The power battery with the treasured cover structure according to claim 1, wherein the shell is provided with mounting openings, the mounting openings are respectively communicated with different electric core accommodating cavities, and the mounting openings are provided with explosion-proof pieces.

6. The power cell of claim 2, further comprising a connector plate and a post, wherein the cover assembly is provided with a mounting hole, the post is mounted in the mounting hole, a first side of the connector plate is connected to the post, and a second side of the connector plate opposite to the first side is connected to the tab of the cell.

7. The power cell of claim 6, wherein the tabs comprise positive tabs and negative tabs, the connector plates comprise copper connector plates and aluminum connector plates, the copper connector plates connect the positive tabs in parallel, and the aluminum connector plates connect the negative tabs in parallel.

8. The power cell of claim 7, wherein the posts comprise an anode post and a cathode post, the cathode post is fixedly mounted to the negative cap assembly, the anode post is fixedly mounted to the positive cap assembly, the anode post is connected to the copper connector plate, and the cathode post is connected to the aluminum connector plate.

9. The battery of claim 1, wherein at least one cell is disposed in each cell receiving cavity, and the cell comprises at least two cells.

10. The power cell of claim 1, wherein the housing is provided with an outer insulating layer on a peripheral side thereof.

11. The battery of claim 1, wherein the cell wrap is provided with an insulating film separating the cell from the housing.

12. The battery of claim 1, wherein the housing and the separator are integrally formed.

13. The power cell of claim 6, wherein the mounting hole side wall is provided with a sealing ring.