CN115084761A

CN115084761A - Electricity core support and battery module

Info

Publication number: CN115084761A
Application number: CN202210848121.6A
Authority: CN
Inventors: 金云涛; 肖荣
Original assignee: Guangdong Shouhang Smart New Energy Technology Co ltd
Current assignee: Guangdong Shouhang Smart New Energy Technology Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-09-20
Anticipated expiration: 2042-07-19
Also published as: CN115084761B

Abstract

The embodiment of the invention relates to the technical field of energy storage equipment, and discloses a battery cell support and a battery module. This electricity core support includes: at least one first bracket and a pair of second brackets; at least one first bracket is sequentially arranged to form a first bracket group, and two second brackets are respectively arranged at two ends of the first bracket group; an installation cavity for accommodating the battery cell is enclosed between the first support and the second support or between two adjacent first supports; the first support comprises two first side plates, a first spacer bar, a second spacer bar and a third spacer bar which are opposite, two ends of the first spacer bar are respectively connected with the top ends of the two first side plates, two ends of the second spacer bar are respectively connected with the bottom ends of the two first side plates, and two ends of the third spacer bar are respectively connected with the middle parts of the two first side plates; the width of the third spacer bar is less than the width of the first spacer bar and the second spacer bar. Because the third spacer bars limit the transverse expansion degree of the middle part of the battery cell so as to avoid the expansion exceeding the allowable range, the battery cell can be ensured to run safely and reliably.

Description

Electricity core support and battery module

Technical Field

The invention relates to the technical field of energy storage equipment, in particular to a battery cell support and a battery module.

Background

At present, a lithium ion battery is used as one of core components of an energy storage system, great financial resources and efforts are invested by various large energy storage system integrators and cell manufacturers in the aspect of safety performance of the energy storage system, and the safety of the energy storage system needs to be controlled from the aspects of a cell monomer, a BMS, thermal management and the like. In terms of thermal management of the energy storage system, a liquid cooling mode with high cost and complex design is mostly adopted in the design of the battery module.

Disclosure of Invention

Therefore, it is necessary to provide a cell support and a battery module, which have low manufacturing cost and can ensure stable and reliable operation of a cell, and the purpose of the present invention is to solve at least some of the defects of the cooling mode of the conventional cell support and battery module.

In order to solve the above technical problem, one of the technical solutions adopted by the embodiments of the present invention is:

a cell support, comprising: at least one first rack, the at least one first rack arranged in a row of first rack groups; the two second brackets are respectively arranged at two ends of the first bracket group; an installation cavity for accommodating the battery cell is enclosed between the first support and the second support or between two adjacent first supports; the two ends of the first support group refer to the two tail ends of at least one first support in the arrangement direction; the first bracket comprises two first side plates, a first spacer bar, a second spacer bar and a third spacer bar which are oppositely arranged; the two first side plates are respectively provided with at least one air opening, and the air openings are used for dissipating heat of the battery cell; the first spacer bar, the second spacer bar and the third spacer bar are mutually parallel and fixedly connected between the two first side plates; two ends of the first spacing rod are respectively connected with the top ends of the two first side plates, two ends of the second spacing rod are respectively connected with the bottom ends of the two first side plates, and two ends of the third spacing rod are respectively connected with the middle parts of the two first side plates; the first brace is symmetrical about a central plane, the central plane being a plane formed by a centerline of the first spacer bar, a centerline of the second spacer bar, and a centerline of the third spacer bar; the width of the first spacer bar is equal to that of the second spacer bar, and the width of the third spacer bar is smaller than that of the first spacer bar or that of the second spacer bar.

As a further improvement of the above, the first bracket further includes a first bottom plate; the two first side plates are respectively fixed at two opposite end edges of the first bottom plate in a mode of being perpendicular to the first bottom plate; the top end of the first side plate refers to the end of the first side plate away from the first bottom plate, and the bottom end of the first side plate refers to the end of the first side plate close to the first bottom plate.

As a further improvement of the above scheme, the battery cell support further comprises a top frame; a plurality of parallel separating ribs extend outwards from the surface of the top frame, and two adjacent separating ribs surround the surface of the top frame to form a mounting top lattice matched with the mounting cavity; the mounting top lattice is used for accommodating the top end of the battery core provided with the electrode.

As a further improvement of the above solution, the cell holder further includes a pair of end plates; the end plate is mounted to the second bracket on a surface of the second bracket facing away from the mounting chamber.

As a further improvement of the above scheme, the top frame and the end plate are provided with a clamping structure, and the top frame and the end plate are fixedly connected through the clamping structure.

As a further improvement of the above scheme, the device further comprises a binding band; the surfaces of the first bracket, the second bracket and the end plate are provided with belt grooves matched with the binding belt; the strap is arranged in the belt groove to fixedly connect the first support, the second support and the end plate into a whole.

a battery module comprises a plurality of battery cells; and the battery cell supports are respectively and correspondingly accommodated in the installation cavities of the battery cell supports.

The battery cell support and the battery module provided by the embodiment of the invention have the beneficial effects that: the heat generated by the battery cell in the working process can be dissipated outwards through the air openings formed in the first side plates, or the airflow for dissipating heat can flow into one of the air openings of the first side plates and then flows out from the air opening of the other first side plate along with the heat generated by the battery cell, so that the heat dissipation capacity of the battery module is improved; and because the middle part of support is provided with the third spacer bar, the third spacer bar can restrict the horizontal inflation degree in electric core middle part in order to avoid the inflation to exceed the allowed limit to ensure that electric core can the safe and reliable operation.

Drawings

One or more embodiments are illustrated in corresponding drawings which are not intended to be limiting, in which elements having the same reference number designation may be referred to as similar elements throughout the drawings, unless otherwise specified, and in which the drawings are not to scale.

Fig. 1a is a perspective view of a battery module according to an embodiment of the present invention;

fig. 1b is an exploded view of a battery module according to an embodiment of the present invention;

fig. 2 is an exploded view of a cell support according to an embodiment of the present invention;

FIG. 3a is a block diagram of a first bracket provided in accordance with an embodiment of the present invention;

FIG. 3b is a front view of the first bracket seen in direction i in FIG. 3 a;

FIG. 3c is a top view of the first bracket of FIG. 3a, as seen in the direction ii;

FIG. 4a is a block diagram of a second bracket according to an embodiment of the present invention, showing structural features of one side surface of the second bracket;

FIG. 4b is a block diagram of a second bracket according to an embodiment of the present invention, showing structural features of the other side surface of the second bracket;

FIG. 5a is a block diagram of a top frame provided in accordance with an embodiment of the present invention, illustrating structural features of a first surface of the top frame;

FIG. 5b is a top view of the head frame of FIG. 5a looking in the direction of V1;

FIG. 5c is a sectional view taken along section lines V2-V2 in FIG. 5 b;

FIG. 5d is a block diagram of a top frame according to an embodiment of the present invention showing structural features of a second surface of the top frame;

FIG. 5e is a block diagram of the top frame according to an embodiment of the present invention, showing the assembled relationship of some components on the second surface of the second bracket;

FIG. 6a is a block diagram of an end plate according to an embodiment of the present invention, showing structural features of one side surface of the end plate;

fig. 6b is a block diagram of an end plate according to an embodiment of the present invention, showing structural features of the other side surface of the end plate.

Detailed Description

The invention is described in detail below with reference to specific embodiments, it should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the invention.

It is to be understood that, unless otherwise explicitly specified or limited, all references to "central," "longitudinal," "lateral," "up," "down," "vertical," "horizontal," "inner," "outer," and the like herein are to be interpreted as referring to the orientation or positional relationship shown in the drawings and are for convenience in describing the invention and in order to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. 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 to implicitly indicate the number of technical features indicated; thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more; "and/or" includes any and all combinations of one or more of the associated listed items. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1a and fig. 1b, the battery module 100 provided by the present invention includes at least two battery cells 10 and a battery cell support 20.

As shown in fig. 2, the cell holder 20 includes at least one first holder 21 and a pair of second holders 22.

One or more first racks 21 are arranged in a row of the first rack group a. In a row of the first bracket group a formed by arranging a plurality of the first brackets 21, a mounting chamber B1 is defined between two adjacent first brackets 21.

The two second brackets 22 are respectively arranged at two ends of the first bracket group A and are respectively matched with the first brackets 21 at two ends of the first bracket group A to enclose to form a mounting chamber B1; or a first bracket group a formed by one first bracket 21 alone, and two second brackets 22 are respectively arranged at both sides of the first bracket 21 to enclose the mounting chamber B1. The battery cell 10 is housed in the mounting chamber B1.

It should be noted that, the two ends of the first bracket group a refer to two ends in the arrangement direction of the plurality of first brackets 21, or two sides of one first bracket 21.

As shown in fig. 3a, the first bracket 21 includes two first side plates 211 disposed oppositely, at least one air opening 2114 is opened on each of the two first side plates 211, and the air opening 2114 is used for dissipating heat of the battery cell 10.

The first bracket 21 further comprises a first base plate 212 and a number of spacer bars (213, 214, 215). The two first side plates 211 are respectively fixed at two opposite end edges of the first bottom plate 212 in a manner of being perpendicular to the first bottom plate 212, and a plurality of partition rods are fixedly connected between the two first side plates 211 in parallel.

The first side plate 211 is in the shape of an I. Specifically, the first side plate 211 includes a first top side transverse plate 2111, a first bottom side transverse plate 2112, and a first connecting plate 2113. The first top-side transverse plate 2111 and the first bottom-side transverse plate 2112 are parallel to each other, and a first strip slot 2115 with a preset width is arranged on the surfaces of the first top-side transverse plate 2111 and the first bottom-side transverse plate 2112, which are away from the spacer bar; the first connecting plate 2113 has two ends connected to a first top side transverse plate 2111 and a first bottom side transverse plate 2112, respectively.

The spacer bars include a first spacer bar 213, a second spacer bar 214 and a third spacer bar 215, and the first spacer bar 213, the second spacer bar 214 and the third spacer bar 215 may be all provided with a heat dissipation port C. Wherein, two ends of the first spacing bar 213 are respectively connected with the first top transverse plate 2111 of the two first side plates 211; two ends of the second partition bar 214 are respectively connected with the first bottom transverse plates 2112 of the two first side plates 211; the third spacer 215 is located between the first spacer 213 and the second spacer 214, and both ends of the third spacer are connected to the middle of the first connecting plate 2113 of the two first side plates 211.

For the convenience of the present description, the end of the first side plate 211 away from the first bottom plate 212, i.e., the end where the first top side transverse plate 2111 is located, will be referred to as the top end; the end of the first side plate 211 that is close to the first bottom plate 212, i.e., the end where the first bottom transverse plate 2112 is located, is referred to as the bottom end.

Referring to fig. 3a and 3b, the first frame 21 is a symmetrical body symmetrical about the center plane S. The center plane S is an imaginary plane that simultaneously passes through the center lines (O1, O2, O3) of the three spacers, or is formed by the center line O1 of the first spacer 213, the center line O2 of the second spacer 214, and the center line O3 of the third spacer 215. The central plane S is perpendicular to the first side plate 211 and intersects the first side plate 211 in a straight line X.

As shown in fig. 3b, when viewed from the direction of the first side plate 211, the two first side plates 211 coincide, the end surfaces of the first partition bar 213, the third partition bar 215, and the second partition bar 214 are sequentially arranged along the straight line X from the top end to the bottom end, and the two first side plates 211, the first bottom plate 212, the first partition bar 213, the third partition bar 215, and the second partition bar 214 are bisected by the central plane S into left and right halves symmetrical about the central plane S.

The first spacer bar 213, the second spacer bar 214, and the third spacer bar 215 may each have a rectangular cross-section. The orthographic projections of the first spacer bars 213 and the second spacer bars 214 on the first base plate 212 are overlapped, that is, the width D1 of the first spacer bars 213 is equal to the width D2 of the second spacer bars 214. The orthographic projection of the third spacer bar 215 on the first base plate 212 falls within the orthographic projection of the first spacer bar 213 or the second spacer bar 214 on the first base plate 212, i.e., the width D3 of the third spacer bar 215 is smaller than the width D1 of the first spacer bar 213 or the width D2 of the second spacer bar 214. In the present embodiment, the widths (D1, D2) of the first and

second bars

213, 214 may be set to 8mm, and the width D3 of the third bar may be set to 5 mm.

In this embodiment, the first side plate 211 may be divided into an upper section and a lower section with the third spacer 215 as a boundary. In the first side plate 211, a portion between the first top lateral plate 2111 and the third partition bar 215 is an upper section, a portion between the first bottom lateral plate 2112 and the third partition bar 215 is a lower section, and both the upper section and the lower section may be provided with at least one air opening 2114.

The first bracket 21 as a whole may be manufactured using ABS plus PC. In this embodiment, the first bracket 21 may be formed by injection molding the first side plate 211, the first bottom plate 212, and the spacer bars in an integrated manner. In other embodiments, the first side plate 211, the first bottom plate 212 and the partition bars may be separately injection-molded and then fixedly connected together to assemble the first bracket 21. The temperature resistance of the first bracket 21 manufactured and molded by ABS and PC injection molding can exceed 80 ℃.

As shown in fig. 4a, the second bracket 22 includes a second bottom panel 221, two second side panels 222 and a third side panel 223. The two second side plates 222 are fixed to the two opposite end edges of the second bottom plate 221 in a manner perpendicular to the second bottom plate 221; the third side plate 223 is fixed to a side edge between both end edges of the second bottom plate 221 in a manner perpendicular to the second bottom plate 221, and two second side plates 222 are fixedly connected to both sides, respectively.

Specifically, the second side plate 222 is shaped like a half "h", and includes a second top side transverse plate 2221, a second bottom side transverse plate 2222, and a second connecting plate 2223, the second top side transverse plate 2221 is parallel to the second bottom side transverse plate 2222, two ends of the second connecting plate 2223 are respectively and fixedly connected to the second top side transverse plate 2221 and the second bottom side transverse plate 2222, and second belt grooves 2224 with a predetermined width are disposed on the surfaces of the second top side transverse plate 2221 and the second bottom side transverse plate 2222 that are away from the third side plate 223.

As shown in fig. 5a, the cell holder 20 further includes a top frame 23. The first surface of the top frame 23 may extend outwards to form a plurality of parallel ribs 231, two adjacent ribs 231 enclose a mounting top lattice B2 matched with the mounting chamber B1 on the first surface of the top frame 23, and the mounting top lattice B2 is used for accommodating the top end of the battery cell 10 provided with the electrode. As shown in fig. 5b and 5c, the width D5 of the spacer bar 231 is equal to the width D1 of the first spacer bar 213.

As shown in fig. 5d, a plurality of cavities E are disposed on a second surface of the top frame 23 away from the spacer bars 231. The cavity E is defined by a flange 232 protruding from the second surface of the top frame 23. A pair of electrode holes 233 are formed in the cavity E. As shown in fig. 5E, the electrode holes 233 are covered by electrode plates 234 placed in the cells E.

As shown in fig. 1a and 2, the top frame 23 is mounted at the top end of the battery module 100 with the first surface facing the electrodes of the battery cells 10. A gap is formed between two adjacent battery cells 10 due to the separation of the first spacer bar 213 and the second spacer bar 214, the spacer bar 231 of the top frame 23 is placed in the gap, the top grid B2 is installed to accommodate the top end of the battery cell 10, and the battery cell 10 is accommodated in the battery cell holder 20 by matching with the first holder 21 and the second holder 22.

After the top end of the battery cell 10 is received in the mounting grid B2, the electrode of the battery cell 10 may pass through the electrode hole 233 and abut against the electrode plate 234 to establish electrical contact. In this embodiment, the positive electrode of one of the two adjacent battery cells 10 passes through one of the electrode holes 233 in the cavity E, the negative electrode of the other battery cell 10 passes through the other electrode hole 233 in the same cavity E, and after passing through the electrode holes 233, the two electrode holes are both in electrical contact with the electrode plate 234 covering and fixed in the cavity E, so as to connect the two adjacent battery cells 10 in series.

Referring to fig. 5d, in some embodiments, an electrode fixing plate 235 made of an insulating material may be further fixed to the second surface of the top frame 23. The electrode fixing plate 235 includes a fixing main plate 235a and a fixing support plate 235b, and the fixing support plate 235b extends outward from a side edge of the fixing main plate 235 a.

Referring to fig. 5d and 5E, on the second surface of the top frame 23, the flange 232 defining the cavity E also defines the mounting groove F. The fixed main plate 235a can be fixed in the mounting groove F by a suitable fixing manner such as threaded connection or welding, and the fixed support plate 235b extends into the cavity lattice E from the notch 232a of the flange 232 and then abuts against the surface of the electrode plate 234, so that the electrode plate 234 is fixed in the cavity lattice E, and the problem that the electrode plate 234 is loosened from the top frame 23 to cause poor electrical contact between the battery cells 10 or circuit disconnection of the battery module 100 is avoided.

As shown in fig. 2, the cell holder 20 may further include a pair of end plates 24. The end plate 24 is mounted to the second support 22 on the third side plate 223 on the surface facing away from the cell 10.

Specifically, as shown in fig. 4b, the surface of the third side plate 223 contacting the end plate 24 is provided with a plurality of positioning posts 223a extending outward, and as shown in fig. 6a, the surface of the end plate 24 contacting the third side plate 223 is provided with a plurality of positioning holes 241. The positioning posts 223a cooperate with the positioning holes 241 to position the end plate 24 on the surface of the second frame 22.

As shown in fig. 6b, the top end and the bottom end of the surface of the end plate 24 facing away from the third side plate 223 may be respectively provided with a third belt groove 242, and the third belt groove 242 is adapted to the first belt groove 2115 and the second belt groove 2224. In addition, ribs 243 protruding from the surface of the end plate 24 may be further provided on the surface, and the ribs 243 may serve to increase the strength and rigidity of the end plate 24.

The top frame 23 and the end plate 24 may also be provided with a snap-fit structure to facilitate assembly of the components constituting the cell holder 20. Specifically, as shown in fig. 5a and 6a, the engaging structure includes a latching post 236 and a latching hole 244, wherein the latching post 236 may be disposed on the top frame 23 (or the end plate 24) and integrally injection-molded with the top frame 23 (or the end plate 24); as shown in fig. 6a, the fastening hole 244 may be opened in the end plate 24 (or the top frame 23), and the fastening column 236 may be fastened in the fastening hole 244, so as to fixedly connect the top frame 23 and the end plate 24 to each other.

The end plate 24 provided in the present embodiment is advantageous in that the end plate 24 and the second support 22 cooperate with each other to better inhibit the lateral expansion of the battery cell 10 caused by heat, and reduce the deformation of the second support 22 caused by the lateral expansion of the battery cell 10.

In order to better understand the technical solution of the present application, the following brief statements are made on the assembly process of the battery module 100 having more than two first brackets 21 provided in the embodiments of the present application:

s10, arranging a plurality of first brackets 21 in sequence in a row of first bracket groups a in a manner that the spacers are opposite, arranging two second brackets 22 at two ends of the first bracket group a respectively, and positioning and assembling two end plates 24 on surfaces of the two second brackets 22 respectively.

S11, the two adjacent first brackets 21 or the first bracket 21 and the second bracket 22 at the end of the first bracket group a enclose a mounting chamber B1, and the battery cell 10 is accommodated in the mounting chamber B1.

S12, the top frame 23 and the end plate 24 are fixed by the engagement structure.

S13, the first strap slot 2115 of each first top transverse plate 2111, the second strap slot 2224 of the second top transverse plate 2221, and the third strap slot 242 at the top end of the end plate 24 are connected to form a top strap slot at the top end of the battery module 100; the first strap grooves 2115 of the first bottom cross plate 2112, the second strap grooves 2224 of the second bottom cross plate 2222, and the third strap grooves 242 at the bottom end of the end plate 24 are connected to form bottom strap grooves at the bottom end of the battery module 100. As shown in fig. 1a and 2, the top and bottom belt grooves are tightened by the binding bands 25, respectively, to tighten the top and bottom ends of the battery module 100, thereby securing the overall assembly strength of the battery module 100.

In the embodiment of the present application, the binding band 25 may be made of a steel band made of 65Mn steel. The thickness of the steel strip is 1mm, the tensile strength is more than or equal to 900MPa, the yield strength is more than or equal to 800MPa, the steel strip adopts a lapping process, and the lapping strength is not less than 70% of the material strength.

As will be understood by those skilled in the art, in the cell holder 20 composed of one first holder 21, two second holders 22 are respectively disposed at two sides of the first holder 21 (i.e., two sides of the central plane S), so that two mounting cavities B1 for accommodating the cells 10 can be enclosed at two sides of the first holder 21. The specific assembly process can refer to the above-mentioned embodiment with more than two first brackets 21, and for brevity, the description will not be described in detail.

One of the advantages of the battery module 100 provided by the embodiment of the present application is that, after the battery cells 10 are accommodated in the mounting cavities B1 of the battery cell supports 20, for each first support 21, the battery cells 10 are accommodated in both sides of the first support 21 demarcated by the spacer bars. Due to the pretightening force of the binding band 25, the two adjacent battery cells 10 are close to each other in the direction of the spacer bars and tightly attached to the side surfaces of the first spacer bar 213 and the second spacer bar 214, so that an air duct communicated with the air opening 2114 can be enclosed by the two adjacent battery cells 10 on the first bracket 21, the air opening 2114 formed in the first side plate 211 on both sides can be dissipated by heat generated by the battery cells 10 in the working process through the air duct, or air flow for heat dissipation can flow into the air duct from the air opening 2114 of one of the first side plates 211 and then flow out from the air opening 2114 of the other first side plate 211 together with the heat generated by the battery cells 10, thereby greatly improving the heat dissipation capability of the battery module 100.

Another advantage is that, since the width D3 of the third spacer bar 215 is designed to be smaller than the width (D1, D2) of the first spacer bar 213 or the second spacer bar 214, as shown in fig. 3c, that is, a preset single-side distance D4 exists between two side surfaces of the third spacer bar 215 and two side surfaces of the first spacer bar 213 or the second spacer bar 214, in the embodiment of the present application, the preset single-side distance D4 may be set to be 1.5mm, that is, a single side is allowed to have a maximum lateral expansion of only 1.5mm after the battery cell 10 is heated, the lateral expansion of the battery cell 10 is prevented from exceeding an allowable value, and stable operation of the battery cell 10 is ensured.

The foregoing is a further detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to these descriptions. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. A cell support, comprising:

at least one first rack, the at least one first rack arranged in a row of first rack groups;

the two second brackets are respectively arranged at two ends of the first bracket group;

an installation cavity for accommodating the battery cell is enclosed between the first support and the second support or between two adjacent first supports;

the two ends of the first support group refer to the two tail ends of at least one first support in the arrangement direction;

the first support comprises two first side plates, a first spacer bar, a second spacer bar and a third spacer bar which are arranged oppositely;

the two first side plates are respectively provided with at least one air opening, and the air openings are used for dissipating heat of the battery cell;

the first spacer bar, the second spacer bar and the third spacer bar are fixedly connected between the two first side plates in parallel; two ends of the first spacing rod are respectively connected with the top ends of the two first side plates, two ends of the second spacing rod are respectively connected with the bottom ends of the two first side plates, and two ends of the third spacing rod are respectively connected with the middle parts of the two first side plates;

the first brace is symmetrical about a central plane, the central plane being a plane formed by a centerline of the first spacer bar, a centerline of the second spacer bar, and a centerline of the third spacer bar;

the width of the first spacer bar is equal to that of the second spacer bar, and the width of the third spacer bar is smaller than that of the first spacer bar or the second spacer bar.

2. The cell holder of claim 1, wherein the first holder further comprises a first base plate;

the two first side plates are respectively fixed at two opposite end edges of the first bottom plate in a manner of being perpendicular to the first bottom plate;

the top end of the first side plate refers to the end of the first side plate away from the first bottom plate, and the bottom end of the first side plate refers to the end of the first side plate close to the first bottom plate.

3. The cell holder of claim 2, further comprising a top frame; a plurality of parallel separating ribs extend outwards from the surface of the top frame, and two adjacent separating ribs surround the surface of the top frame to form a mounting top lattice matched with the mounting cavity; the mounting top lattice is used for accommodating the top end of the battery core provided with the electrode.

4. The cell holder of claim 3, further comprising a pair of end plates; the end plate is mounted to the second bracket on a surface of the second bracket facing away from the mounting chamber.

5. The cell support of claim 4, wherein the top frame and the end plate are provided with a clamping structure, and the top frame and the end plate are fixedly connected through the clamping structure.

6. The cell holder of claim 4 or 5, further comprising a strap;

the surfaces of the first bracket, the second bracket and the end plate are provided with belt grooves matched with the binding belt; the strap is placed in the strap groove to fixedly connect the first bracket, the second bracket and the end plate into a whole.

7. A battery module is characterized by comprising

At least two cells;

the battery cell support of any one of claims 1 to 6, wherein the battery cells are respectively and correspondingly accommodated in the installation cavities of the battery cell support.