CN218677443U

CN218677443U - Battery module and electric equipment

Info

Publication number: CN218677443U
Application number: CN202223097900.1U
Authority: CN
Inventors: 吕泽栋
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-21
Anticipated expiration: 2032-11-22

Abstract

The utility model relates to a battery module and consumer, include: the support is provided with a clearance through hole, and a limiting part is formed on the wall of the clearance through hole; and electric core, electric core install on the support, and the tip of electric core is provided with utmost point post and explosion-proof valve, and utmost point post and explosion-proof valve expose from keeping away empty through-hole, and utmost point post is used for connecting the connecting piece, and utmost point post is equipped with spacing cooperation portion, and spacing cooperation portion and spacing cooperation of portion are so that explosion-proof valve and the setting of staggering of connecting piece. Through spacing cooperation relation of spacing cooperation portion and spacing portion, can realize that directional installation when electric core loads into the support is spacing to after connecting piece and utmost point post are connected fixedly, the connecting piece can stagger each other with explosion-proof valve and arrange, avoids the connecting piece to produce to shelter from explosion-proof valve, and so, when extreme condition appears in the battery module and causes internal pressure to rise unusually, explosion-proof valve can normally break eruption pressure release, eliminates latent potential safety hazard, promotes battery module and uses the reliability.

Description

Battery module and electric equipment

Technical Field

The utility model relates to a battery technology field especially relates to a battery module and consumer.

Background

Currently, in order to increase the energy density and improve the endurance of the electric vehicle, the battery generally exists in a module form, i.e., a battery module. Use conventional cylinder battery module as an example, it mainly comprises on installing the support by a plurality of cylinder electricity cores, thereby realizes outside concentrated output current through connecting piece welding electrical property switch on between each cylinder electricity core.

However, in actual production, there is very big randomness in the direction that the support was packed into to cylinder electricity core, causes the explosion-proof valve on the cylinder electricity core to shelter from after the connecting piece welding easily, and then when the extreme condition appears in the battery module, the connecting piece caused the interference to the normal eruption pressure release of explosion-proof valve, causes the incident, has reduced battery module service reliability.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a battery module and consumer, aims at solving prior art explosion-proof valve and sheltered from and can't normally erupt the pressure release by the connecting piece, has the potential safety hazard, reduces the problem that battery module used the reliability.

In one aspect, the present application provides a battery module, which includes:

the support is provided with a clearance through hole, and a limiting part is formed on the wall of the clearance through hole; and

the battery cell, the battery cell install in on the support, the tip of battery cell is provided with utmost point post and explosion-proof valve, utmost point post with explosion-proof valve is followed keep away empty through-hole and expose, utmost point post is used for connecting the connecting piece, just utmost point post is equipped with spacing cooperation portion, spacing cooperation portion with spacing cooperation of portion makes explosion-proof valve with the setting of staggering of connecting piece.

When the battery module of the scheme is assembled and processed, need pack electric core into the support in, make the utmost point post and the explosion-proof valve of electric core tip expose from the clearance through-hole department that predetermines on the support, because the protruding spacing portion that is equipped with of pore wall of clearance through-hole, utmost point post is equipped with spacing cooperation portion simultaneously, spacing cooperation through spacing cooperation portion and spacing portion, directional installation when can realize that electric core packs into the support is spacing, thereby after connecting piece and utmost point post are connected fixedly, the connecting piece can stagger each other with the explosion-proof valve and arrange, avoid the connecting piece to produce to shelter from the explosion-proof valve, therefore, when the battery module extremely condition appears and causes the internal pressure to rise unusually, the explosion-proof valve can normally break the eruption pressure release, eliminate potential safety hazard, promote battery module reliability of use.

The technical solution of the present application is further described below:

in one embodiment, the limiting part comprises a limiting wall surface, and the limiting matching part comprises a limiting matching surface which can be in limiting abutment with the limiting wall surface.

In one embodiment, the number of the limiting wall surfaces is at least two, the limiting wall surfaces are arranged at intervals, the number of the limiting matching surfaces is at least two, and the limiting matching surfaces and the limiting wall surfaces are arranged in a one-to-one correspondence manner.

In one embodiment, one of the limiting wall surface and the limiting matching surface is provided with a first plane, the other of the limiting wall surface and the limiting matching surface is provided with a second plane, and the first plane is in adaptive abutment with the second plane.

In one embodiment, one of the limiting wall surface and the limiting matching surface is provided with an outer convex arc surface, the other of the limiting wall surface and the limiting matching surface is provided with an inner concave arc surface, and the inner concave arc surface is matched and embedded with the outer convex arc surface.

In one embodiment, the bracket is further formed with a hollow groove, and the hollow groove is formed by surrounding the two limiting wall surfaces and part of the hole wall of the hollow through hole.

In one embodiment, a tolerance gap is formed between the limiting wall surface and the limiting matching surface.

In one embodiment, the support comprises a first connecting frame, and the first connecting frame is mounted on the top end of the battery cell.

In one embodiment, the support further includes a second connecting frame, and the second connecting frame is mounted at the bottom end of the battery cell.

On the other hand, this application still provides a consumer, and it includes as above-mentioned battery module.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an assembly structural view of a battery module in the present application;

FIG. 2 is a schematic structural view of FIG. 1 with a portion of the connector removed;

fig. 3 is a schematic top view of fig. 2.

Description of reference numerals:

100. a battery module; 10. a support; 11. avoiding empty through holes; 12. a limiting wall surface; 13. hollowing out the grooves; 14. a first link frame; 15. a second link frame; 20. an electric core; 21. a pole column; 211. a limiting matching surface; 22. an explosion-proof valve; 30. a connecting member; 40. a tolerance gap.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The battery monomer is provided for this application implementation, and this battery monomer is specifically the cylinder battery. It includes: the end cap assembly, the shell, the roll core assembly and the electrolyte. The shell is provided with an inlet and an outlet which are communicated with each other and an accommodating cavity, electrolyte is flushed in the winding core assembly during installation, the winding core assembly is installed in the accommodating cavity through the inlet and the outlet, and then the end cover assembly and the inlet and the outlet are installed in a sealing mode, so that the cylindrical battery after being packaged can be obtained.

The end cap assembly includes: an end cap body and a flow collection member. The winding core assembly comprises a positive pole lug and a negative pole lug; the end cover assembly covers the opening of the shell, the positive current collecting member is connected with the positive pole lug, and the negative current collecting member is connected with the negative pole lug.

The end cover body is provided with a positive pole column and a negative pole column at intervals; the current collecting members are at least two and are respectively a positive current collecting member and a negative current collecting member, the positive current collecting member is connected with the positive pole, and the negative current collecting member is connected with the negative pole.

The winding core assembly is composed of a positive pole piece, a negative pole piece and a diaphragm. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece includes anodal mass flow body and anodal active substance layer, and anodal active substance layer coats in anodal mass flow body's surface, and the anodal mass flow body protrusion in the anodal mass flow body that has coated anodal active substance layer of uncoated anodal active substance layer, and the anodal mass flow body that does not coat anodal active substance layer is as anodal utmost point ear.

Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative pole mass flow body, and the negative pole mass flow body protrusion in the negative pole mass flow body of coating the negative pole active substance layer not coating the negative pole active substance layer, and the negative pole mass flow body of not coating the negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together.

The material of the diaphragm may be PP (polypropylene) or PE (polyethylene). In addition, the core assembly may be a winding structure or a laminated structure, and the embodiments of the present application are not limited thereto.

As shown in fig. 1 to 3, a battery module 100 according to an embodiment of the present invention includes: support 10 and battery cell 20. The support 10 is used for loading and fixing the battery cell 20, so that the battery cell 20 can work safely. The battery cell 20 is used for performing an electrochemical reaction to generate and output electric current.

In this embodiment, the bracket 10 is provided with a clearance through hole 11, and a limiting part is formed on the wall of the clearance through hole 11; battery cell 20 installs on support 10, and battery cell 20's tip is provided with utmost point post 21 and explosion-proof valve 22, and utmost point post 21 and explosion-proof valve 22 expose from keeping away empty through-hole 11, and utmost point post 21 is used for connecting piece 30, and utmost point post 21 is equipped with spacing cooperation portion, and spacing cooperation portion and spacing cooperation of spacing so that explosion-proof valve 22 and connecting piece 30 stagger the setting.

In this embodiment, the connecting piece is preferably aluminum bar as the component connecting the two cells and conducting electricity. It should be noted that there are many flexible connectors in the battery module 100, and the flexible connectors may be aluminum bars or copper bars. Wherein, aluminium bar is used for connecting between battery and battery to realize the electric connection between the battery. And the copper bars are used to connect between the battery and the circuit board to achieve the electrical connection of the battery and the circuit board.

It should be noted that the anti-explosion valve 22 and the connecting member 30 are arranged in a staggered manner, which may mean that they are completely separated; it can also mean that there is a projected overlap of a certain area, and the size and position of the projected overlap area should be determined so as not to affect the normal burst of explosion-proof valve 22.

In summary, the implementation of the technical solution of the present embodiment has the following beneficial effects: when the battery module 100 of the above scheme is assembled and processed, it is necessary to pack the battery cell 20 into the bracket 10, so that the terminal post 21 and the explosion-proof valve 22 at the end of the battery cell 20 can be exposed from the clearance through hole 11 preset on the bracket 10, because the hole wall of the clearance through hole 11 is convexly provided with the limiting part, the terminal post 21 is provided with the limiting matching part, through the limiting matching relation between the limiting matching part and the limiting part, the directional installation of the battery cell 20 when being packed into the bracket 10 can be realized, so that when the connecting piece 30 is connected and fixed with the terminal post 21, the connecting piece 30 can be mutually staggered with the explosion-proof valve 22, that is, it is ensured that the orthographic projection of the connecting piece can not cover the explosion-proof valve, the connecting piece 30 is prevented from shielding the explosion-proof valve 22, therefore, when the internal pressure is abnormally increased due to the extreme condition of the battery module, the explosion-proof valve 22 can normally rupture and release pressure, potential safety hazards are eliminated, and the use reliability of the battery module is improved.

As can be seen from fig. 1 and 2, the connecting members 30 are provided in plurality, and a part of the connecting members 30 is provided along a side parallel to the bracket 10, and a part of the connecting members 30 is arranged obliquely to the side of the bracket 10. For the connecting pieces 30 arranged in parallel, the long sides of the connecting pieces 30 do not shield the explosion-proof valve 22, and for the connecting pieces 30 arranged obliquely, the corners of the wide ends of the rectangular connecting pieces 30 do not shield or shield the explosion-proof valve 22 by a small amount.

Referring to fig. 3, in some embodiments, the position-limiting portion includes a position-limiting wall 12, and the position-limiting matching portion includes a position-limiting matching surface 211, and the position-limiting matching surface 211 and the position-limiting wall 12 can be in position-limiting contact. When the battery cell 20 is installed in the support 10, the battery cell 20 can be oriented in the installation direction by axially aligning the position-limiting wall surface 12 and the position-limiting fitting surface 211 until the position-limiting fitting surface 211 abuts against the position-limiting wall surface 12, so that the circumferential rotational degree of freedom of the battery cell 20 can be further limited, and the purpose of fixing the battery cell 20 is achieved. Meanwhile, the explosion-proof valve 22 can be directionally avoided by means of the abutting of the limiting wall surface 12 and the limiting matching surface 211, so that the explosion-proof valve 22 can be avoided by the connecting piece 30 after the connecting piece 30 is installed subsequently.

Optionally, the connecting piece 30 and the pole 21 are connected into a whole in a welding mode, so that the connecting strength is high and the connecting reliability is good.

Further, on the basis of the above embodiment, the limiting wall surfaces 12 are arranged at least two and are arranged at intervals, the limiting matching surfaces 211 are arranged at least two, and the limiting matching surfaces 211 and the limiting wall surfaces 12 are arranged in a one-to-one correspondence manner. The two sets of limiting wall surfaces 12 and the limiting matching surface 211 are abutted simultaneously, so that the directional installation and limiting effects on the battery cell 20 can be enhanced, and a better fool-proof effect is achieved.

In order to realize the adaptive abutment of the position-limiting wall surface 12 and the position-limiting engagement surface 211, in some embodiments, one of the position-limiting wall surface 12 and the position-limiting engagement surface 211 is provided with a first plane, and the other one of the position-limiting wall surface 12 and the position-limiting engagement surface 211 is provided with a second plane, and the first plane is adaptive abutment with the second plane. Or, as an alternative to the above embodiment, one of the limiting wall surface 12 and the limiting matching surface 211 is provided with an outward convex arc surface, and the other of the limiting wall surface 12 and the limiting matching surface 211 is provided with an inward concave arc surface, and the inward concave arc surface is fittingly embedded with the outward convex arc surface.

In actual production, the problem of manufacturing dimension errors inevitably occurs. For example, after the pole 21 of the battery cell 20 has a manufacturing dimension error, when the battery cell 20 is installed in the bracket 10, the problem of axial interference between the limit fitting surface 211 and the limit wall surface 12 is caused, that is, the battery cell 20 cannot be installed in place, and the original purpose of installing the battery cell in a directional manner to prevent the connecting member 30 from shielding the explosion-proof valve 22 cannot be achieved.

In this regard, in some embodiments, a tolerance gap 40 is formed between the restraint wall 12 and the restraint mating surface 211. The existence of the tolerance gap 40 enables the battery cell 20 to have the fault tolerance capability of circumferential rotation of +/-10 degrees relative to the support 10 when being installed, so that a certain relative tolerance capability is provided between the support 10 and the battery cell 20, and the adverse effect of manufacturing dimension errors on normal assembly of the battery cell 20 and the support 10 is eliminated.

In addition, on the basis of any of the above embodiments, the bracket 10 is further formed with a hollow groove 13, and the hollow groove 13 is formed by two limiting wall surfaces 12 and partial hole walls of the clearance through holes 11. The first hollow groove 13 is arranged to reduce the weight of the bracket 10, which is beneficial to realizing the light weight design of the battery module; in addition, the pole 21 of the battery cell 20 is avoided, and the pole 21 is prevented from interfering with the bracket 10 when the battery cell 20 is rotatably adjusted during installation. As shown in fig. 3, if the hollow-out groove 13 is not provided, the non-limiting fitting surface of the terminal 21 may interfere with the bracket 10 when the installation angle of the battery cell 20 is adjusted, and if the hollow-out groove 13 is designed, the bracket 10 and the terminal 21 may not interfere with each other, and the hollow-out groove 13 is designed to increase the heat dissipation function inside the battery module 100.

In this application, the bracket 10 includes a first connecting frame 14 and a second connecting frame 15, the first connecting frame 14 is installed on the top end of the battery cell 20, and the second connecting frame 15 is installed on the bottom end of the battery cell 20. The first and second connection frames 14 and 15 may fix both axial ends of the battery cell 20, respectively, to more stably position the battery cell 20.

In addition, the present application also provides an electric device, which includes a battery module, where the battery module includes the battery cell according to any of the above embodiments.

The battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. Depending on the packaging method, the battery cells are generally divided into three types: cylindrical batteries, square batteries and pouch batteries.

The battery module referred to in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery module generally includes a case for housing one or more battery cells, and the case prevents liquid or other foreign materials from affecting the charge or discharge of the battery cells.

The electric equipment may take various forms, for example, a mobile phone, a portable device, a notebook computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric power tool, and the like, for example, a spacecraft including an airplane, a rocket, a space shuttle, a spacecraft, and the like, an electric toy including a stationary or mobile electric toy, for example, a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, an electric power tool including a metal cutting electric tool, an abrasive electric tool, an assembly electric tool, and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an electric impact drill, a concrete vibrator, and an electric planer.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to 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", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A battery module is characterized in that,

the method comprises the following steps:

the battery cell, the battery cell install in on the support, the tip of battery cell is provided with utmost point post and explosion-proof valve, utmost point post with explosion-proof valve follows the clearance through-hole exposes, utmost point post is used for connecting the connecting piece, just utmost point post is equipped with spacing cooperation portion, spacing cooperation portion with spacing cooperation of portion is so that explosion-proof valve with the setting of staggering of connecting piece.

2. The battery module according to claim 1, wherein the limiting portion comprises a limiting wall surface, and the limiting engagement portion comprises a limiting engagement surface, and the limiting engagement surface can be in limiting abutment with the limiting wall surface.

3. The battery module according to claim 2, wherein the limiting wall surfaces are arranged in at least two spaced-apart positions, the limiting engagement surfaces are arranged in at least two spaced-apart positions, and the limiting engagement surfaces are arranged in one-to-one correspondence with the limiting wall surfaces.

4. The battery module according to claim 2 or 3, wherein one of the limiting wall surface and the limiting fitting surface is provided with a first plane, the other of the limiting wall surface and the limiting fitting surface is provided with a second plane, and the first plane is in fit abutment with the second plane.

5. The battery module according to claim 2 or 3, wherein one of the limiting wall surface and the limiting fitting surface is provided with an outward convex arc surface, and the other of the limiting wall surface and the limiting fitting surface is provided with an inward concave arc surface, and the inward concave arc surface is fittingly embedded with the outward convex arc surface.

6. The battery module according to claim 3, wherein the bracket is further formed with a hollow groove surrounded by the two limiting wall surfaces and a part of the hole wall of the clearance through hole.

7. The battery module according to claim 2, wherein a tolerance gap is formed between the stopper wall surface and the stopper mating surface.

8. The battery module of claim 1, wherein the bracket comprises a first connecting frame, and the first connecting frame is mounted on the top end of the cell.

9. The battery module of claim 8, wherein the bracket further comprises a second connecting frame, and the second connecting frame is mounted at the bottom end of the battery cell.

10. An electric device comprising the battery module according to any one of claims 1 to 9.