WO2018218502A1

WO2018218502A1 - Fixing frame, battery module, and battery pack

Info

Publication number: WO2018218502A1
Application number: PCT/CN2017/086597
Authority: WO
Inventors: 张上富; 仝勇军; 黄银成; 钱木; 余凯勤; 朱涛声
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2018-12-06
Also published as: CN110612616B; CN110612616A

Abstract

A fixing frame (32), a battery module (3), and a battery pack (P). The fixing frame (32) comprises: a frame body (321) and two thermally-conductive plates (322). Each thermally-conductive plate (322) is provided with a peripheral edge part (3221) and a main body part (3222). The two thermally-conductive plates (322) are docked together in the thickness direction. At least one main body part (3222) at least partly protrudes from the inner side to the outer side in the thickness direction. At least one main body part (3222) is provided with at least one protruding rib (D) protruding from the outer side to the inner side. Each protruding rib (D) and the surface of the corresponding thermally-conductive plate (322) are contactedly connected together. The at least one protruding rib (D) divides an internal space (S) into at least two flow channels. A flow inlet (W1), an inflow port (I), the at least two flow channels, an outflow port (O), and a flow outlet (W2) form a through channel. The battery module (3) comprises two secondary batteries (31) and the described fixing frame (32). The battery pack (P) comprises a plurality of the described battery module (3) arranged in parallel. As such, an external heat exchanging system and impact brought forth by an incomplete seal of an air cooling design in the prior art are obviated, heat dissipation effects are increased, and the structural design of the flow channels is simple.

Description

Fixing frame, battery module and battery pack

Technical field

The present invention relates to the field of batteries, and in particular, to a mounting bracket, a battery module, and a battery pack.

Background technique

At present, in order to solve the heat dissipation problem of the soft pack battery pack, it is usually required to apply a glue to attach the secondary battery to the metal plate, and transfer the heat of the soft pack secondary battery to the external water cooling system by using the heat conduction function of the metal plate, or in two A gap is reserved between the metal plates as air duct for air cooling, but this implementation has the following problems:

1) It only conducts heat conduction through the metal plate, and the heat dissipation efficiency is low. The more heat generated during the charging and discharging process of the secondary battery is even too late to be exported, and the heat dissipation effect is poor, which affects the performance of the secondary battery;

2) The heat dissipation effect of the metal plate is largely determined by the thermal conductivity of the metal plate, and the limitation is large;

3) The battery pack is designed to be cooled by the air duct. The air ducts are relatively independent, and it is necessary to provide convection for each air duct. The design of the battery pack structure becomes complicated and difficult to implement;

4) The air-cooling design is adopted as a air duct through the reserved gap between the two heat-dissipating plates. The convective air duct is not completely closed. When the cooling air is in contact with the secondary battery, the water vapor in the air will corrode the poles and turn of the secondary battery. The busbar affects the performance of the secondary battery and the life of the battery pack.

Summary of the invention

In view of the problems in the prior art, it is an object of the present invention to provide a holder, a battery module, and a battery pack that can eliminate the heat exchange system that is excluded, and eliminate the incomplete closure of the air-cooled design in the prior art. The impact.

It is still another object of the present invention to provide a holder, a battery module, and a battery pack that can improve heat dissipation.

Still another object of the present invention is to provide a holder, a battery module, and a battery pack having a flow path The structure design is simple.

In order to achieve the above object, in a first aspect, the present invention provides a fixing frame comprising: a frame body surrounded by a peripheral wall and having an inlet port and an outflow port on the peripheral wall; and two heat conducting plates fixed to the frame In the perimeter wall of the frame. Each of the heat transfer plates has a peripheral portion, and a body portion connected to the peripheral portion. Wherein one side of one heat conducting plate facing the other heat conducting plate is defined as an inner side, and a side opposite to the inner side of each heat conducting plate is defined as an outer side; the two heat conducting plates are butted together along the thickness direction of the frame body, and two peripheral edges The portion is fixed in the peripheral wall of the frame, and the two heat conducting plates cooperate at the peripheral portion to form an inflow port and an outflow port; at least one body portion bulges from the inner side to the outer side at least partially in the thickness direction of the frame body, so that two The peripheral portion and the two body portions form an internal space communicating with the inflow port and the outflow port, and the circumference of the inner space is closed except for a portion communicating with the inflow port and the outflow port; at least one body portion is formed to be drummed from the outer side to the inner side And at least one rib strip, each rib strip abutting with a portion of a surface of the opposite heat conducting plate, the at least one rib strip dividing the inner space into at least two flow channels; the inlet port and the inflow port The at least two flow channels, the outflow port, and the outflow port form a communicating channel.

In order to achieve the above object, in a second aspect, the present invention provides a battery module including two secondary batteries. The battery module further includes the fixing frame according to the first aspect of the present invention, and each of the secondary batteries is correspondingly fixed to a corresponding side surface of each of the heat conducting plates.

In order to achieve the above object, in a third aspect, the present invention provides a battery pack comprising: an upper cover provided with an upper flow path and an upper flow path; and a lower cover provided with a lower flow path and a lower flow path, The lower inlet channel and the lower outlet channel of the lower cover respectively correspond to and communicate with the upper inflow channel and the upper out channel of the upper cover; and the plurality of battery modules according to the second aspect of the present invention arranged side by side are housed in the upper cover The inflow port and the outflow port between the lower cover and the fixing frame of each battery module respectively correspond to and communicate with the lower flow path and the lower flow path of the lower cover.

The beneficial effects of the present invention are as follows:

When the fixing frame is used for the battery module and then used for the battery pack, the influence of the external heat exchange system and the incomplete closure of the air-cooled design in the prior art is eliminated, and when the passage enters the wind When the cooling liquid (such as water) with better heat dissipation is used, the heat dissipation effect is improved. In addition, based on the flow path design, the flow rate and flow direction of the cooling fluid are easily controlled, thereby making the flow path structure design simple.

DRAWINGS

1 is an assembled perspective view of an embodiment of a mounting bracket in accordance with the present invention.

Figure 2 is a perspective view of another angle of Figure 1.

Figure 3 is an exploded view of Figure 1.

Figure 4 is a perspective view of a heat conducting plate of a mounting bracket in accordance with the present invention.

Figure 5 is a perspective view of another angle of Figure 4.

Figure 6 is a perspective view of an embodiment of two butted thermally conductive plates of a mounting bracket in accordance with the present invention.

Fig. 7 is a perspective view taken along line A-A of Fig. 6.

Fig. 8 is a perspective view taken along line B-B of Fig. 6.

Fig. 9 is a perspective view taken along line C-C of Fig. 6.

Figure 10 is a perspective view similar to Figure 7 but showing another embodiment of two butted thermally conductive plates of a mount in accordance with the present invention.

Figure 11 is a perspective view similar to Figure 7 but showing yet another embodiment of two butted thermally conductive plates of the mount in accordance with the present invention.

Figure 12 is a perspective view of an embodiment of the formation of two thermally conductive plates of a mounting bracket in accordance with the present invention.

Figure 13 is a perspective view of another embodiment of the formation of two thermally conductive plates of a mounting bracket in accordance with the present invention.

Figure 14 is a perspective view of another embodiment of a holder in accordance with the present invention.

Figure 15 is a perspective view of an embodiment of a battery module in accordance with the present invention.

Figure 16 is an exploded view of Figure 15 .

Figure 17 is an exploded view of another embodiment of a battery module in accordance with the present invention.

Figure 18 is an exploded perspective view of an embodiment of a battery pack in accordance with the present invention.

Fig. 19 is a perspective view of the upper cover of the battery pack of Fig. 18.

Figure 20 is a perspective view of the lower cover of the battery pack of Figure 18.

Figure 21 is an exploded perspective view of another embodiment of a battery pack in accordance with the present invention.

Fig. 22 is a perspective view of the upper cover of the battery pack of Fig. 21;

Figure 23 is a perspective view of the lower cover of the battery pack of Figure 21 .

Figure 24 is a cross-sectional view of Figure 21 .

Among them, the reference numerals are as follows:

P battery pack 3211 hollow interior

1 upper cover 322 heat conducting plate

11 into the runner 3221 peripheral part

12 upper outflow channel R stiffener

13 upper receiving cavity H hole

2 lower cover 3222 body part

21 under the flow path D drum line

211 first port I inflow port

22 lower outflow channel I1 inflow notch

221 second port O outflow port

23 lower containment chamber O1 outflow recess

3 battery module S internal space

31 secondary battery 323 housing

32 holder 4 gasket

321 frame 5 cushion

W circumference wall b bolt

W1 inlet n nut

W2 outlet

detailed description

The holder, the battery module, and the battery pack according to the present invention will be described in detail below with reference to the accompanying drawings.

First, the holder according to the first aspect of the invention will be explained.

As shown in FIG. 1 to FIG. 14 , the fixing frame 32 according to the present invention comprises: a frame body 321 surrounded by a peripheral wall W and having an inlet port W1 and an outflow port W2 on the peripheral wall W; and two heat conducting plates 322. It is fixed to the peripheral wall W of the frame 321 . Each of the heat conducting plates 322 has a peripheral portion 3221; and a body portion 3222 connected to the peripheral portion 3221; wherein a side of one of the heat conducting plates 322 facing the other heat conducting plate 322 is defined as an inner side, and each of the heat conducting plates 322 is opposite to the inner side One side is defined as an outer side; two heat conducting plates 322 are butted together in the thickness direction of the frame body 321, the two peripheral edge portions 3221 are fixed in the peripheral wall W of the frame body 321, and the two heat conducting plates 322 are fitted at the peripheral edge portion 3221 to form Inflow port I and outflow port O; at least one body portion 3222 at least partially bulges from the inside to the outside in the thickness direction of the frame 321 so that the two peripheral portions 3221 and the two body portions 3222 are formed with the inflow port I and The internal space S connected to the outflow port O, the periphery of the internal space S divided by the inflow port I and the outflow The portion where the port O communicates is closed; at least one body portion 3222 is formed with at least one drum rib D bulging from the outer side to the inner side, and each of the ribs D is abutted with a portion of the surface of the opposite heat conducting plate 322. The at least one drum rib D divides the internal space S into at least two flow passages; the inlet port W1, the inflow port I, the at least two flow channels, the outflow port O, and the outflow port W2 form a communicating passage .

In the fixing frame 32 according to the present invention, when a cooling fluid is introduced, a cooling fluid (for example, a cooling gas or a cooling liquid) flows into the inlet port W1, the inflow port I, the at least two flow paths, the outflow port O, and The passage formed by the outflow port W2 (shown by an arrow in FIG. 24) directly carries out the heat generated by the secondary battery 31 of the battery module 3 described below, thereby avoiding the use of the heat exchange system external to the battery module 31. Since the circumference of the internal space S is closed except for the portion communicating with the inflow port I and the outflow port O, the influence of the incomplete closing of the air-cooling design in the prior art is eliminated (for example, for the secondary battery 32) The polar ear and the corrosion of the adapter piece); when the channel is connected to a cooling liquid (such as water) that is better than the wind, the heat dissipation effect of the battery pack is improved. In addition, based on the flow path design, the flow rate and flow direction of the cooling fluid are easily controlled, thereby making the flow path structure design simple.

In the fixing frame 32 according to the present invention, as shown in FIG. 3 to FIG. 13 , the structures of the two heat conducting plates 322 may be the same or different, and the inflow port I, the at least two flow channels, and the outflow port O may be Formed in a variety of ways.

In an embodiment, as shown in FIG. 3 and FIG. 6 to FIG. 9, the peripheral edge portion 3221 of each of the heat conducting plates 322 is formed with an inflow recess I1 and an outflow recess O1 formed by bulging from the inside to the outside; two inflows The notch I1 forms the inflow port I, and the two outflow notches O1 form the outflow port O.

In an embodiment, as shown in FIG. 3 to FIG. 7 and FIG. 11 , the main body portion 3222 of each of the heat conducting plates 322 is connected to the peripheral edge portion 3221 of each of the heat conducting plates 322 and extends from the peripheral edge portion 3221 of each of the heat conducting plates 322 in the thickness direction. The outer portion is bulged, and the main body portion 3222 of each of the heat conducting plates 322 is formed with at least one drum rib D bulging from the outer side to the inner side; a corresponding one of the one rib rib D of one heat conducting plate 322 and the other one of the other heat conducting plates 322 The drum bars D are abutted together.

As shown in FIG. 3 and FIG. 7, the two heat conducting plates 322 are identical in shape, and the two heat conducting plates 322 are mirrored together in the thickness direction of the frame 321 . The same shape of the two heat conducting plates 322 is advantageous for manufacturing with the same mold, thereby saving manufacturing costs.

In the fixing frame 32 according to the present invention, in another embodiment, referring to FIG. 10, a heat conduction The peripheral portion 3221 of the plate 322 is formed with an inflow recess I1 and an outflow recess O1 that bulge from the inside to the outside; the peripheral portion 3221 of the other heat conducting plate 322 corresponds to the inflow recess I1 and the outflow recess O1. Both parts are flat and form an inflow port I and an outflow port O with the inflow notch I1 and the outflow notch O1, respectively. Further, the body portion 3222 of the other heat conducting plate 322 may be a flat plate.

In the fixing frame 32 according to the present invention, in still another embodiment (not shown), one peripheral portion 3221 of the two heat conducting plates 322 is formed with an inflow recess I1 formed by bulging from the inside to the outside and the other periphery. The portion of the portion 3221 corresponding to the inflow recess I1 is flat and forms an inflow port I with the inflow recess I1; the other peripheral portion 3221 of the two heat conducting plates 322 is formed with an outflow recess formed by bulging from the inside to the outside. O1, a portion of the one peripheral portion 3221 corresponding to the outflow recess O1 is flat and forms an outflow port O with the outflow recess O1.

As shown in FIG. 11, the main body portion 3222 of one heat conducting plate 322 bulges from the inner side to the outer side at a position spaced apart from the peripheral edge portion 3221 of the one heat conducting plate 322 by a predetermined distance.

Of course, the structure of the two heat conducting plates 322 after docking is not limited to the above embodiment, and may be other structural forms. Only after the two heat conducting plates 322 are butted, the inflow port I and the at least two flow paths can be formed. The outflow port O can be connected to the inflow port I, the at least two flow channels, and the outflow port O.

In the holder 32 according to the present invention, as shown in Figs. 12 and 13, the two heat conducting plates 322 are integrally formed. Of course, it is not limited thereto, and the two heat conducting plates 322 can also be formed by a separate molding method.

In an embodiment, each of the drum bars D has an inverted U-shape on a side corresponding to the heat conducting plate 322. Of course, the shape of the drum bar D is not limited thereto, and other shapes may be adopted, which may be determined according to specific conditions.

In order to bring the respective drum bars D into close contact with a part of the surface of the opposite heat conducting plate 322, preferably, the tops of the respective drum bars D are flat. The tops of all the ribs D of each of the heat conducting plates 322 are in the same plane.

In the fixing frame 32 according to the present invention, in order to effectively fix the heat conducting plate 322, the frame body 321 is plastic, and the peripheral edge portion 3221 of each of the heat conducting plates 322 is embedded in the plastic.

In order to enhance the fixing ability of the heat conducting plate 322 and the frame body 321, as shown in FIGS. 3 to 13, the peripheral edge portion 3221 of each of the heat conducting plates 322 is provided with a plurality of reinforcing ribs R, and the reinforcing ribs R are embedded in the plastic. The rib R can increase the local strength of the heat conducting plate 322. In addition, in order to enhance the fixing of the heat conducting plate 322, the peripheral edge portion 3221 of each of the heat conducting plates 322 is provided with a hole H for filling the hole H. Thus, The strength and reliability of the plastic frame 321 and the heat conducting plate 322 are greatly improved, and the heat conducting plate 322 forms a reliable connection with the plastic frame 321 through the hole H, and the heat conducting plate 322 is firmly positioned. The specified position of the plastic frame 321 .

In the holder 32 according to the present invention, the heat conducting plate 322 is stamped.

The heat conducting plate 322 is a metal plate (ie, sheet metal). The metal plate can be, but is not limited to, an aluminum plate.

The two heat conducting plates 322 are integrally formed with the frame body 321 .

In the fixing frame 32 according to the present invention, in an embodiment, as shown in FIGS. 14 and 24, the inlet port W1 is disposed at a position of the peripheral wall W of the frame body 321 aligned with the inflow port I and with the inflow port. I is in a straight line; the outflow port W2 is disposed at a position aligned with the outflow port O of the peripheral wall W of the frame 321 and is in line with the inflow port I.

In the fixing frame 32 according to the present invention, in another embodiment, as shown in FIGS. 1 and 2 and 16, the inlet port W1 is provided at a position of the peripheral wall W of the frame body 321 aligned with the inflow port I. And intersecting with the inflow port I in a straight line. Preferably, the inlet port W1 intersects the inlet port I perpendicularly. Of course, the positions of the inlet port W1 and the outlet port W2 are not limited to the above-described positions, and may be provided at other positions of the peripheral wall, and may be connected to the inlet port I and the outlet port O.

In order to facilitate the mounting of the respective fixing frames 32 and to hold the respective fixing frames 32 together, in an embodiment, as shown in FIGS. 1 and 2, the inlet opening W1 is a boss on one side of the peripheral wall W, and is in the peripheral wall. The opposite side of W is a groove. One side of the peripheral wall W of the outflow port W2 is a groove, and the other side on the opposite side of the peripheral wall W is a boss. The two adjacent fixing brackets 32 are tightly coupled to each other by the bosses and the grooves on the opposite side faces. Of course, the plurality of fixing frames 32 can also adopt other fixing methods, and is not limited thereto.

In the fixing frame 32 according to the present invention, as shown in FIGS. 1 to 3, the peripheral wall W of the frame body 321 encloses a hollow inner portion 3211; the two heat conducting plates 322 divide the hollow inner portion 3211 of the frame body 321 into a frame body 321 The peripheral wall W forms two accommodating portions 323 together, and only one side of each of the heat conducting plates 322 is used to constitute one accommodating portion 323.

Next, a battery module according to a second aspect of the present invention will be described.

Referring to FIGS. 15 to 18, the battery module 3 according to the present invention includes two secondary batteries 31. The battery module 3 further includes a fixing frame 32 according to the first aspect of the present invention. Each of the secondary batteries 31 is received in a corresponding receiving portion 323 and is correspondingly fixed (for example, but not limited to, bonded) to each heat conducting. A side of the board 322 corresponds to one side.

The secondary battery 31 may be a flexible package battery. The flexible packaging battery may be a lithium ion secondary battery, a sodium ion secondary battery, or a zinc ion secondary battery.

Finally, a battery pack according to a third aspect of the invention will be described.

Referring to FIGS. 18 to 24, a battery pack P according to the present invention includes: an upper cover 1 provided with an upper flow path 11 and an upper flow path 12; and a lower cover 2 provided with a lower flow path 21 and a lower flow path 22 The lower inlet passage 21 and the lower outlet passage 22 of the lower cover 2 respectively correspond to and communicate with the upper inlet passage 11 and the upper outlet passage 12 of the upper cover 1; a plurality of side by side arrangement according to the second aspect of the present invention The battery module 3 is housed between the upper cover 1 and the lower cover 2, and the inlet port W1 and the outlet port W2 of the holder 32 of each battery module 3 and the lower flow path 21 and the lower flow path of the lower cover 2, respectively. 22 corresponds and is connected.

In the battery pack P of the third aspect of the present invention, when the cooling fluid is introduced, the fluid flows through the upper inlet flow path 11 of the upper cover 1, the lower flow path 21 of the lower cover 2, and the inlet opening W1 of the holder 32. Inflow port I of the heat conducting plate 322, the at least two flow channels, the outflow port O, the outflow port W2 of the fixing frame 32, the lower flow channel 22 of the lower cover 2, and the upper flow channel 12 of the upper cover 1 The heat generated by the secondary battery 31 in the battery pack P is taken away, which greatly improves the heat dissipation effect of the battery pack.

The upper cover 1 is formed with an upper receiving cavity 13 and the lower cover 2 is formed with a lower receiving cavity 23, and the upper receiving cavity 13 of the upper cover 1 and the lower receiving cavity 23 of the lower cover 2 house the plurality of battery modules 3 together.

In the battery pack P according to the third aspect of the present invention, as shown in FIGS. 17, 18, 21 and 24, the upper inlet flow path 11 of the upper cover 1 and the lower flow path 21 of the lower cover 2 are provided at the abutment of the lower flow path 21 of the lower cover 2. The gasket 4 is provided with a gasket 4 at the abutment of the upper flow passage 12 of the upper cover 1 and the lower flow passage 22 of the lower cover 2, and the inlet opening W1 and the lower inlet passage 21 of the fixing frame 32 (Fig. 20) The abutment of the first port 211 and the first port 211 of FIG. 24 is provided with a gasket 4, an outlet port W2 of the holder 32 and a lower outlet channel 22 (such as the second port 221 of FIG. 20, FIG. 24). A gasket 4 is provided at the abutment of the second port 221). The arrangement of the gasket 4 can effectively prevent leakage of fluid at the interface of the flow passage.

In order to effectively buffer the expansion of the secondary battery 31 in the battery pack P, as shown in FIGS. 18 and 21, the battery pack P further includes: a cushion 5 disposed (for example, but not limited to, bonded) to adjacent ones. Between two battery modules 3. Wherein, the secondary battery 31 expands during the charging and discharging cycle of the battery module 3, and since the secondary battery 31 is in contact with the corresponding heat conducting plate 322, expansion of the secondary battery 31 causes the heat conducting plate 322 to The drum bar D is pressed to the inside or even flattened, and further This causes the flow path to shrink and reduces the heat dissipation effect of the battery pack P. Therefore, the cushion pad 5 provides sufficient space for the expansion of the secondary battery 31 due to the elastic compressible property, reduces or prevents deformation of the drum rib D, and improves the heat dissipation effect of the battery pack P. The selection of the elastic compressibility of the cushion 5 can be determined depending on the actual expansion needs of the secondary battery 31.

As shown in FIGS. 18 and 21, the upper cover 1 and the lower cover 2 are fixed together by a plurality of bolts b and a plurality of nuts n which are screwed together.

Claims

A fixing frame (32) comprising:

a frame body (321) surrounded by a peripheral wall (W) and having an inlet port (W1) and an outlet port (W2) on the peripheral wall (W);

Two heat conducting plates (322) are fixed in the peripheral wall (W) of the frame body (321);

It is characterized in that

Each heat conducting plate (322) has:

Peripheral part (3221);

The body portion (3222) is connected to the peripheral portion (3221);

among them,

One side of one heat conducting plate (322) facing the other heat conducting plate (322) is defined as an inner side, and a side of each heat conducting plate (322) opposite to the inner side is defined as an outer side;

The two heat conducting plates (322) are butted together in the thickness direction of the frame body (321), the two peripheral edge portions (3221) are fixed in the peripheral wall (W) of the frame body (321), and the two heat conducting plates (322) are on the periphery. Portions (3221) cooperate to form an inflow port (I) and an outflow port (O);

At least one body portion (3222) bulges from the inside to the outside at least partially in the thickness direction of the frame body (321), so that the two peripheral edge portions (3221) and the two body portions (3222) are formed with the inflow port (I) The internal space (S) communicating with the outflow port (O), and the periphery of the internal space (S) is closed except for the portion communicating with the inflow port (I) and the outflow port (O);

At least one body portion (3222) is formed with at least one rib (D) bulging from the outside to the inside, each rib (D) abutting a portion of the surface of the opposite heat conducting plate (322), Said at least one drum strip (D) dividing the internal space (S) into at least two flow passages;

The inlet port (W1), the inflow port (I), the at least two flow channels, the outflow port (O), and the outflow port (W2) form a communicating passage.
The holder (32) of claim 1 wherein:

The peripheral portion (3221) of each of the heat conducting plates (322) is formed with an inflow recess (I1) and an outflow recess (O1) formed by bulging from the inside to the outside;

Two inflow notches (I1) form an inflow port (I), and two outflow notches (O1) form an outflow Port (O).
The holder (32) of claim 1 wherein:

The main body portion (3222) of each of the heat transfer plates (322) is connected to the peripheral edge portion (3221) of each of the heat transfer plates (322) and bulges outward from the peripheral edge portion (3221) of each of the heat transfer plates (322) in the thickness direction, and each heat transfer is performed. The body portion (3222) of the plate (322) is formed with at least one drum rib (D) bulging from the outside to the inside;

A corresponding one of the ribs (D) of one of the heat conducting plates (322) abuts against a corresponding one of the ribs (D) of the other of the heat conducting plates (322).
The holder (32) according to claim 1, wherein the two heat conducting plates (322) are identical in shape, and the two heat conducting plates (322) are mirrored together in the thickness direction of the frame body (321).
The holder (32) of claim 1 wherein:

a peripheral portion (3221) of a heat conducting plate (322) is formed with an inflow recess (I1) and an outflow recess (O1) that bulges from the inside to the outside;

The two portions of the peripheral portion (3221) of the other heat conducting plate (322) corresponding to the inflow recess (I1) and the outflow recess (O1) are both flat and inward with the inflow recess (I1) The flow notches (O1) form an inflow port (I) and an outflow port (O), respectively.
The holder (32) according to claim 5, wherein the body portion (3222) of the other heat conducting plate (322) is a flat plate.
The holder (32) of claim 1 wherein:

One peripheral portion (3221) of the two heat conducting plates (322) is formed with an inflow recess (I1) formed by bulging from the inside to the outside, and a portion of the other peripheral portion (3221) corresponding to the inflow recess (I1) is Flat and form an inflow port (I) with the inflow recess (I1);

The other peripheral portion (3221) of the two heat conducting plates (322) is formed with an outflow recess (O1) formed from the inner side to the outer side, and the outer peripheral portion (3221) and the outflow recess (O1) The corresponding portion is flat and forms an outflow port (O) with the outflow recess (O1).
The holder (32) of claim 1 wherein:

The body portion (3222) of one heat conducting plate (322) bulges from the inside to the outside from a position spaced apart from the peripheral edge portion (3221) of the one heat conducting plate (322) by a predetermined distance.
The holder (32) according to claim 1, wherein the two heat conducting plates (322) are integrally formed.
The holder (32) according to claim 1, characterized in that each of the drum bars (D) has an inverted U-shape on a side corresponding to the heat conducting plate (322).
The holder (32) according to claim 1, characterized in that the top of each of the drum bars (D) is flat.
The holder (32) according to claim 1, wherein the tops of all of the ribs (D) of each of the heat conducting plates (322) are in the same plane.
The fixing frame (32) according to claim 1, wherein the frame body (321) is plastic, and a peripheral portion (3221) of each of the heat conducting plates (322) is embedded in the plastic.
The fixing frame (32) according to claim 13, wherein a peripheral portion (3221) of each of the heat conducting plates (322) is provided with a plurality of reinforcing ribs (R), and the reinforcing ribs (R) are embedded in the plastic.
The fixing frame (32) according to claim 13, characterized in that the peripheral portion (3221) of each of the heat conducting plates (322) is provided with a hole (H) and a plastic filling hole (H).
The holder (32) of claim 1 wherein the thermally conductive plate (322) is stamped.
The holder (32) according to claim 1, wherein the heat conducting plate (322) is a metal plate.
The holder (32) according to claim 14, wherein the two heat conducting plates (322) are integrally formed with the frame body (321).
The holder (32) of claim 1 wherein:

The inlet port (W1) is disposed at a position of the peripheral wall (W) of the frame body (321) aligned with the inflow port (I) and in line with the inflow port (I);

The outflow port (W2) is disposed at a position aligned with the outflow port (O) of the peripheral wall (W) of the frame body (321) and is in line with the inflow port (I).
The fixing frame (32) according to claim 1, wherein the inlet port (W1) is disposed at a position of the peripheral wall (W) of the frame body (321) aligned with the inflow port (I) and with the inflow port (I) intersect without being in a straight line.
The holder (32) according to claim 20, wherein the inlet port (W1) is a boss on one side of the peripheral wall (W) and a groove on the opposite side of the peripheral wall (W) .
The holder (32) according to claim 20, wherein one side of the peripheral wall (W) of the outflow port (W2) is a groove, and the other side of the peripheral wall (W) is a boss.
The holder (32) of claim 1 wherein:

The peripheral wall (W) of the frame (321) encloses a hollow interior (3211);

The two heat conducting plates (322) divide the hollow inner portion (3211) of the frame body (321) to form two receiving portions (323) together with the peripheral wall (W) of the frame body (321), and only the heat conducting plates (322) One side is used to form a housing portion (323).
A battery module (3) comprising two secondary batteries (31), characterized in that the battery module (3) further comprises a fixing frame (32) according to any one of claims 1-23, each of two The secondary battery (31) is correspondingly fixed to a corresponding side surface of each of the heat conducting plates (322).
The battery module (3) according to claim 24, characterized in that the secondary battery (31) is a flexible package battery.
A battery pack (P), characterized in that it comprises:

The upper cover (1) is provided with an upper flow passage (11) and an upper flow passage (12);

The lower cover (2) is provided with a lower flow passage (21) and a lower flow passage (22), and the lower inlet passage (21) and the lower outlet passage (22) of the lower cover (2) and the upper cover (1), respectively The upper inlet channel (11) corresponds to and is connected to the upper and lower flow channels (12);

The battery module (3) according to any one of claims 24-25 arranged side by side, is received between the upper cover (1) and the lower cover (2), and the fixing frame of each battery module (3) The inlet port (W1) and the outlet port (W2) of (32) correspond to and communicate with the lower inlet passage (21) and the lower outlet passage (22) of the lower cover (2), respectively.
The battery pack (P) according to claim 26, wherein the upper cover (1) is formed with an upper receiving cavity (13), and the lower cover (2) is formed with a lower receiving cavity (23), the upper cover (1) The upper receiving chamber (13) and the lower receiving chamber (23) of the lower cover (2) house the plurality of battery modules (3) together.
The battery pack (P) according to claim 26, wherein a gasket is provided at an abutting portion of the upper inlet passage (11) of the upper cover (1) and the lower inlet passage (21) of the lower cover (2) ( 4) The gasket (4) and the inlet of the fixing frame (32) are provided at the joint of the upper flow passage (12) of the upper cover (1) and the lower flow passage (22) of the lower cover (2). (W1) is provided with a gasket (4) at the joint of the lower flow passage (21), and a gasket is arranged at the joint between the outlet port (W2) of the fixing frame (32) and the lower flow passage (22) (4) ).
The battery pack (P) according to claim 26, wherein the battery pack (P) further comprises: a cushion (5) disposed between the adjacent two battery modules (3).
A battery pack (P) according to claim 26, wherein the upper cover (1) and the lower cover (2) are fixed together by a plurality of bolts (b) and a plurality of nuts (n) which are screwed together.