CN112820996A

CN112820996A - Battery module

Info

Publication number: CN112820996A
Application number: CN202011606334.5A
Authority: CN
Inventors: 马静; 雷磊; 王志浩
Original assignee: Yinlong New Energy Co Ltd; Northern Altair Nanotechnologies Co Ltd
Current assignee: Yinlong New Energy Co Ltd; Northern Altair Nanotechnologies Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-05-18

Abstract

The invention provides a battery module, which comprises: the battery pack comprises a battery pack, a shell assembly and a cover plate assembly, wherein the shell assembly is provided with a first accommodating space for accommodating the battery pack; the cover plate assembly is detachably arranged on the shell assembly to shield the battery pack, the cover plate assembly is provided with two tabs respectively connected with the anode and the cathode of the battery pack, and at least part of each tab is positioned on the outer side of the cover plate assembly; and a cooling plate having a cooling pipe into which a cooling liquid flows, the cooling plate being disposed inside the housing assembly and contacting the battery pack. The battery module solves the problem that the battery module in the prior art is complex in structure.

Description

Battery module

Technical Field

The invention relates to the field of batteries, in particular to a battery module.

Background

The development of new energy industry enables battery technology to be widely applied, and battery energy storage systems and battery power systems are widely applied to the fields of new energy automobiles, power station power generation, rail transit and the like. In the application occasions, high-power charge and discharge conditions occur, so that the battery can emit a large amount of heat in the process of high-rate charge and discharge in the actual application field. For example, the power plant suddenly increases the load, the automobile suddenly accelerates, and the like. Heat build-up can cause damage to components, compromising equipment and personal safety. In order to take away heat, there are different cooling methods in the prior art, such as air cooling, liquid cooling, self cooling, etc. Among these cooling methods, liquid cooling is the fastest effective cooling method, so a water-cooled battery box suitable for various occasions is a key research and development point of electric energy storage.

At present, the liquid cooling mode for the water-cooling battery box on the market is a cooling plate mode, the cooling plate is tightly attached to a battery pack, then cooling liquid is injected into the cooling plate, and the heat of the battery is taken away through the circulating flow of the cooling liquid. The following problems need to be solved in the design process: the cooling plate is attached to the battery body; the water inlet and outlet of the water cooling component are arranged; the cooling pipeline of the water cooling assembly is distributed; controlling the weight of the battery box; designing an anti-collision and anti-seismic structure of the battery box; the design of the overall structure of the battery box and the like.

The technical problem is that the main factor influencing the design of the battery pack under the high-power condition and the problems influencing the system and arrangement design of different numbers of battery boxes under different application scenes, so that the existing battery pack has a complex structure and too large weight in order to meet the application of various scenes.

Disclosure of Invention

The present invention is directed to a battery module, which solves the problem of complicated structure of the battery module in the prior art.

In order to achieve the above object, the present invention provides a battery module including: a battery pack; a housing assembly having a first receiving space for receiving the battery pack; the cover plate assembly is detachably mounted on the shell assembly to shield the battery pack and is provided with two tabs respectively connected with the anode and the cathode of the battery pack, and at least part of each tab is positioned on the outer side of the cover plate assembly; and a cooling plate having a cooling pipe into which a cooling liquid flows, the cooling plate being disposed inside the housing assembly and contacting the battery pack.

Further, the cover plate assembly comprises a first cover plate connected with the shell assembly and a second cover plate connected with the battery pack, and the first cover plate and the second cover plate are arranged at intervals to form a second containing space between the first cover plate and the second cover plate.

Furthermore, the tab is provided with a fixing part and a conduction part which are arranged in the second accommodating space, and one end of the conduction part extends out of the first cover plate; the fixed part is installed on the second apron, is provided with the first hole of dodging the conduction portion on the first apron.

Furthermore, a second avoidance hole of the cover plate assembly for extending out of the infusion port of the cooling pipeline is formed in the first cover plate; and/or the second cover plate is arranged at a distance from the shell assembly so as to form an avoiding channel between the cover plate assembly and the shell assembly for the transfusion port of the cooling pipeline to extend out of the first accommodating space.

Further, offer the notes gluey hole that supplies the packing to let in on the first apron, annotate gluey hole and first accommodation space and second accommodation space and all communicate.

Further, the shell assembly comprises two first protection plates and two second protection plates, wherein the two first protection plates are oppositely arranged, and the two first protection plates are clamped between the two second protection plates to form a first containing space; the cooling plate is two, and two cooling plates are detachably installed respectively on two first guard plates.

Further, first guard plate is provided with the joint groove, and the cooling plate passes through the joint groove card to be established on first guard plate.

Furthermore, the cooling pipeline has two infusion mouths that supply the coolant to flow in or flow out the cooling pipeline, and the apron subassembly is all worn out to two infusion mouths, and each infusion mouth all sets up towards the side of shell subassembly.

Further, the battery pack includes a plurality of spacers and a plurality of cells, the spacers having a spacing section contacting the cells and a connecting section contacting the cooling plate, the plurality of spacers being disposed at intervals.

Further, be provided with the buckle on the apron subassembly, buckle and spacer joint to make the apron subassembly install the upside at the group battery.

Further, the shell component and the cover plate component are made of plastic materials, the shell component comprises a bottom plate and a plurality of rib plates, and the plurality of rib plates are arranged on the bottom plate at intervals; and/or the cooling plate is made of an aluminum alloy material.

By applying the technical scheme of the invention, the battery module comprises: the battery pack comprises a battery pack, a shell assembly and a cover plate assembly, wherein the shell assembly is provided with a first accommodating space for accommodating the battery pack; the cover plate assembly is detachably arranged on the shell assembly to shield the battery pack, the cover plate assembly is provided with two tabs respectively connected with the anode and the cathode of the battery pack, and at least part of each tab is positioned on the outer side of the cover plate assembly; and a cooling plate having a cooling pipe into which a cooling liquid flows, the cooling plate being disposed inside the housing assembly and contacting the battery pack. Adopt above-mentioned setting, set up the cooling plate in the outside of group battery, thereby set up the shell subassembly in the outside of cooling plate with the cooling plate spacing between group battery and shell subassembly again for thereby cooling plate and group battery contact cool off the group battery. The cover plate assembly is mounted above the battery pack and protects the battery pack from above the battery pack, and provides mounting positions for tabs of the battery pack and other components communicated with the outside. Thereby, the cooling plate in the battery module and the integrative setting of shell subassembly, the effect of parts such as utmost point ear and the integrative setting of apron subassembly have been reached. Furthermore, the cooling plate, the lug and other components in the battery module do not need to be structurally arranged independently, so that the battery assembly has the functions of water cooling, shock prevention, collision prevention and the like, and the problem of complex structure of the battery module in the prior art is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a battery module according to the present invention;

fig. 2 is a schematic view illustrating the installation of a first sheathing plate and a second sheathing plate of a battery module according to the present invention;

fig. 3 is a front view illustrating a battery module of the present invention in fig. 2;

fig. 4 is a plan view illustrating a battery module of the present invention in fig. 2;

fig. 5 is a schematic view illustrating the installation of a cooling plate of the battery module according to the present invention;

fig. 6 is a partially enlarged view of a portion I of the battery module of the present invention in fig. 5;

fig. 7 is a front view illustrating the battery module of the present invention in fig. 5;

fig. 8 is a side view illustrating the battery module of the present invention in fig. 5; and

fig. 9 is a schematic structural view illustrating a cap plate assembly of a battery module according to the present invention.

Wherein the figures include the following reference numerals:

1. a housing assembly; 11. a first guard plate; 12. a second guard plate; 13. a base plate; 14. a rib plate; 2. a cover plate assembly; 21. a first cover plate; 211. a first avoidance hole; 212. a second avoidance hole; 213. injecting glue holes; 22. a second cover plate; 221. buckling; 3. a cooling plate; 311. an infusion port; 31. a cooling pipeline; 4. a battery pack; 41. a spacer; 411. a spacer section; 412. a connecting section; 5. a tab; 51. a fixed part; 52. a conductive portion.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 9, the battery module of the present embodiment includes: a battery pack 4; a housing assembly 1, the housing assembly 1 having a first receiving space for receiving a battery pack 4; the cover plate assembly 2 is detachably mounted on the shell assembly 1 to shield the battery pack 4, the cover plate assembly 2 is provided with two tabs 5 respectively connected with the positive electrode and the negative electrode of the battery pack 4, and at least part of each tab 5 is positioned on the outer side of the cover plate assembly 2; and a cooling plate 3, the cooling plate 3 having a cooling pipe 31 into which a cooling liquid flows, the cooling plate 3 being disposed inside the housing assembly 1 and contacting the battery pack 4. Adopt above-mentioned setting, set up cooling plate 3 in the outside of group battery 4, thereby set up shell subassembly 1 in the outside of cooling plate 3 with cooling plate 3 spacing between group battery 4 and shell subassembly 1 again for thereby cooling plate 3 cools off group battery 4 with the contact of group battery. The cover plate assembly 2 is mounted above the battery pack, the cover plate assembly 2 protects the battery pack 4 from above the battery pack 4, and the cover plate assembly 2 provides a mounting position for tabs 5 of the battery pack 4 and other components communicating with the outside. Thereby, the cooling plate 3 among the battery module sets up with shell subassembly 1 is integrative, and parts such as utmost point ear 5 and the integrative effect that sets up of apron subassembly 2 have been reached. Furthermore, components such as the cooling plate 3, the tab 5 and the like in the battery module do not need to be structurally arranged independently, so that the battery assembly has the functions of water cooling, shock prevention, collision prevention and the like, and the problem of complex structure of the battery module in the prior art is solved.

Specifically, the battery module includes: a battery pack 4, a housing assembly 1, a cover plate assembly 2, and a cooling plate 3, the battery pack 4 being a module composed of a plurality of cells that supplies electric power to the outside. In the embodiment, the batteries are connected in series and in parallel by welding the positive and negative electrode lugs of the batteries. The battery pack 4 is located in a containing space surrounded by the shell component 1, a cooling plate 3 is further contained in the containing space, and the cooling plate 3 is arranged on the inner side of the shell component 1 and is in contact with the battery pack 4, so that the effect of cooling the battery pack is achieved. Shell subassembly 1 can protect group battery 4 and cooling plate 3 in the accommodation space, and apron subassembly 2 detachably installs on shell subassembly 1 in order to shelter from group battery 4, and apron subassembly 2 can be followed the top and protected battery assembly, and apron subassembly 2 has two utmost point ears 5 of being connected respectively with the positive pole and the negative pole of group battery 4 to make the group battery pass through utmost point ear 5 and external intercommunication, provide the electric energy for external world.

In the battery module of the present embodiment, as shown in fig. 1 and 9, the cover plate assembly 2 includes a first cover plate 21 connected to the housing assembly 1 and a second cover plate 22 connected to the battery pack 4, and the first cover plate 21 and the second cover plate 22 are disposed at a distance to form a second receiving space between the first cover plate 21 and the second cover plate 22.

In the battery module of the present embodiment, the cap plate assembly 2 includes: first apron 21 and second apron 22, first apron 21 and second apron 22 set up with interval to form the second accommodation space between first apron 21 and second apron 22, the effect of second accommodation space is for other parts of battery module such as utmost point ear 5, the signal of telecommunication collection line provide the mounted position. And, the first cover plate 21 is connected with the housing assembly 1 and the second cover plate 22 is connected with the battery pack 4, so that the structure is more concise, and the installation space for installing the battery module is saved.

As shown in fig. 9, in the battery module of the present embodiment, the tab 5 has a fixing portion 51 and a conducting portion 52 disposed in the second receiving space, and one end of the conducting portion 52 protrudes out of the first cover plate 21; the fixing portion 51 is attached to the second cover 22, and the first cover 21 is provided with a first escape hole 211 for escaping from the conductive portion 52.

In the battery module of the present embodiment, the tab 5 is composed of the fixing portion 51 and the conduction portion 52; the fixing portion 51 is attached to the second lid 22, and the fixing portion 51 is connected to the electrode of the battery pack through the second lid 22. The conductive part 52 is provided on the fixing part 51, and the conductive part 52 functions to communicate the battery pack 4 with the outside through the tab 5, thereby supplying power to the outside. In order to achieve the purpose that the conducting part 52 is communicated with the outside, the first cover plate 21 of the present embodiment is provided with a first avoiding hole 211, and the conducting part 52 passes through the first avoiding hole and extends out of the first cover plate 21.

In the battery module of the present embodiment, as shown in fig. 3 to 6, the first cover plate 21 is provided with a second avoiding hole 212 of the cover plate assembly 2 for the infusion port 311 of the cooling pipeline 31 to extend out; and/or the second cover plate 22 is arranged at a distance from the housing assembly 1 to form an escape passage between the cover plate assembly 2 and the housing assembly 1 for the infusion port 311 of the cooling pipeline 31 to protrude out of the first accommodating space.

In order to enable the operator to fill the cooling pipeline 31 disposed on the cooling plate 3 with the cooling liquid from the outside of the battery module, in this embodiment, the first cover plate 21 is provided with a second avoiding hole 212 of the cover plate assembly 2 for the liquid inlet 311 of the cooling pipeline 31 to extend out. With the arrangement, the first cover plate 21 does not block the operation personnel from introducing or discharging the cooling liquid into or from the cooling pipeline 31 on the cooling plate 3, and the performance of the battery module is ensured. The second cover plate 22 is disposed at a distance from the housing assembly 1 to form an escape passage between the cover plate assembly 2 and the housing assembly 1 for the supply opening 311 of the cooling line 31 to protrude from the first accommodation space. With the arrangement, the second cover plate 22 does not block the cooling liquid from flowing into or out of the cooling pipeline 31 on the cooling plate 3, and the performance of the battery module is ensured.

As shown in fig. 1, in the battery module of this embodiment, the first cover plate 21 is provided with a glue injection hole 213 for filling glue to enter, and the glue injection hole 213 is communicated with the first accommodating space and the second accommodating space. The operating personnel can carry out the injecting glue through injecting glue hole 213 to the battery module, has satisfied the demand of battery module.

In the battery module of the present embodiment, as shown in fig. 1, the housing assembly 1 includes two first protection plates 11 disposed opposite to each other and two second protection plates 12 disposed opposite to each other, and the two first protection plates 11 are sandwiched between the two second protection plates 12 to enclose a first accommodation space; the number of the cooling plates 3 is two, and the two cooling plates 3 are detachably mounted on the two first shielding plates 11, respectively. With the above arrangement, the arrangement of the cooling plate 3 is simplified, so that the structure of the battery module is simpler.

In the battery module of this embodiment, first guard plate 11 is provided with the joint groove, and cooling plate 3 passes through the joint groove card to be established on first guard plate 11.

As a possible implementation manner, in the present embodiment, the first protection plate 11 is provided with a clamping groove, and the cooling plate 3 is clamped on the first protection plate 11 through the clamping groove. By adopting the arrangement, the cooling plate 3 can be installed in the battery module without adding a connecting piece, and the structure of the battery module is simplified.

In the battery module in this embodiment, as shown in fig. 1 to 8, the cooling pipeline 31 has two infusion ports 311 for flowing cooling fluid into or out of the cooling pipeline 31, the two infusion ports 311 penetrate through the cover plate assembly 2, and each infusion port 311 is disposed toward a side surface of the housing assembly 1.

In order to facilitate the operation personnel to introduce or discharge the cooling liquid into the cooling pipeline 31, in this embodiment, the cooling pipeline 31 has two infusion ports 311 for the cooling liquid to flow into or flow out of the cooling pipeline 31, the two infusion ports 311 penetrate through the cover plate assembly 2, and each infusion port 311 faces the side surface of the housing assembly 1. By adopting the arrangement, the operating personnel can conveniently lead in or lead out the cooling liquid from the cooling pipeline 31 by standing on the two sides of the battery module, thereby increasing the practicability of the battery module.

As shown in fig. 5 and 6, in the battery module of the present embodiment, the battery pack 4 includes the separators 41 and the cells, the separators 41 have the spacing portions 411 contacting the cells and the connecting portions 412 contacting the cooling plates 3, the plurality of separators 41 are provided, and the plurality of separators 41 are provided at intervals.

In the battery module of the present embodiment, the battery pack 4 is composed of the separator 41 and the batteries, the separator 41 is connected to the batteries, the separator 41 includes the spacing section 411 and the connecting section 412, and the spacing section 411 is disposed between the two batteries and is used for guiding out heat generated during the operation of the batteries. The connecting section 412 is in contact with the cooling plate 3, and the connecting section 412 functions to conduct heat generated by the battery to the cooling plate 3. The connection section 412 of the present embodiment is completely attached to the cooling plate 3, thereby improving the heat dissipation efficiency of the battery module.

In the battery module of the present embodiment, as shown in fig. 5 and 6, a latch 221 is provided on the cover plate assembly 2, and the latch 221 is latched to the spacer 41, so that the cover plate assembly 2 is mounted on the upper side of the battery pack 4.

In order to connect the cover plate assembly 2 to the battery pack, in the embodiment, a latch 221 is provided on the cover plate assembly 2, the spacer 41 extends to the upper side of the battery, and the latch 221 is latched on the spacer 41 from the upper edge of the spacer 41. Adopt above-mentioned setting, reached the purpose that battery pack's structure is simplified, establish buckle 221 card on spacer 41, can be when apron subassembly 2 is connected with group battery 4, adjust the relative position of group battery 4 and apron subassembly 2 at any time to the production efficiency of battery module has been improved.

In the battery module of the embodiment, the housing assembly 1 and the cover plate assembly 2 are made of plastic materials, the housing assembly 1 comprises a bottom plate 13 and a plurality of rib plates 14, and the plurality of rib plates 14 are arranged on the bottom plate 13 at intervals; and/or the cooling plate 3 is made of an aluminium alloy material.

In this embodiment, the housing assembly 1 and the cap plate assembly 2 are made of plastic materials, so that the weight of the battery module can be reduced. In the present embodiment, the housing assembly 1 is injection molded, the housing assembly 1 includes the base plate 13 and the plurality of rib plates 14, and the plurality of rib plates 14 are disposed on the base plate 13 at intervals, so that the strength of the housing assembly 1 is ensured while the thickness of the housing assembly 1 is reduced. In the present embodiment, the cooling plate 3 is made of an aluminum alloy material, thereby further reducing the weight of the battery module.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the battery module of the present invention includes: the battery pack comprises a battery pack 4, a shell component 1 and a cover plate component 2, wherein the shell component 1 is provided with a first accommodating space for accommodating the battery pack 4; the cover plate component 2 is detachably arranged on the shell component 1 to shield the battery pack 4, the cover plate component 2 is provided with two tabs 5 respectively connected with the positive pole and the negative pole of the battery pack 4, and at least part of each tab 5 is positioned on the outer side of the cover plate component 2; and a cooling plate 3, the cooling plate 3 having a cooling pipe 31 into which a cooling liquid flows, the cooling plate 3 being disposed inside the housing assembly 1 and contacting the battery pack 4. Adopt above-mentioned setting, set up cooling plate 3 in the outside of group battery 4, thereby set up shell subassembly 1 in the outside of cooling plate 3 with cooling plate 3 spacing between group battery 4 and shell subassembly 1 again for thereby cooling plate 3 cools off group battery 4 with the contact of group battery. The cover plate assembly 2 is mounted above the battery pack, the cover plate assembly 2 protects the battery pack 4 from above the battery pack 4, and the cover plate assembly 2 provides a mounting position for tabs 5 of the battery pack 4 and other components communicating with the outside. Thereby, the cooling plate 3 among the battery module sets up with shell subassembly 1 is integrative, and parts such as utmost point ear 5 and the integrative effect that sets up of apron subassembly 2 have been reached. Furthermore, make parts such as cooling plate 3 in the battery module and utmost point ear 5 not need advance alone and carry out the structure setting, just can make battery pack possess functions such as water-cooling, shockproof and anticollision, solved the complicated problem of battery module structure among the prior art, reached following effect:

the battery module of the invention forms a heat dissipation loop on the cooling plate 3 through the cooling plate 3, thereby simplifying the structure of the liquid cooling component.

The cooling pipeline 31 of the battery module is reasonable in layout, and the water inlet and the water outlet of the cooling pipeline 31 do not influence the series-parallel connection of the battery packs.

The weight of the liquid cooling plate of the battery module is minimized under the condition of meeting the heat dissipation capacity.

The structure of the battery module has the function of a standard liquid cooling battery box.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module, comprising:

a battery pack (4);

a housing assembly (1), the housing assembly (1) having a first receiving space for receiving the battery pack (4);

a cover plate assembly (2), wherein the cover plate assembly (2) is detachably mounted on the shell assembly (1) to shield the battery pack (4), the cover plate assembly (2) is provided with two tabs (5) respectively connected with a positive pole and a negative pole of the battery pack (4), and at least part of each tab (5) is positioned at the outer side of the cover plate assembly (2);

a cooling plate (3), the cooling plate (3) having a cooling pipe (31) into which a cooling liquid flows, the cooling plate (3) being disposed inside the case assembly (1) and contacting the battery pack (4).

2. The battery module according to claim 1, wherein the cover plate assembly (2) comprises a first cover plate (21) connected with the housing assembly (1) and a second cover plate (22) connected with the battery pack (4), the first cover plate (21) being disposed spaced apart from the second cover plate (22) to form a second receiving space between the first cover plate (21) and the second cover plate (22).

3. The battery module according to claim 2, wherein the tab (5) has a fixing portion (51) and a conductive portion (52) disposed in the second receiving space, one end of the conductive portion (52) protruding out of the first cover plate (21); the fixing portion (51) is installed on the second cover plate (22), and a first avoidance hole (211) which avoids the conduction portion (52) is formed in the first cover plate (21).

4. The battery module according to claim 2, wherein the first cover plate (21) is provided with a second avoiding hole (212) through which the liquid inlet (311) of the cooling pipeline (31) extends out of the cover plate assembly (2); and/or the second cover plate (22) is arranged at a distance from the shell assembly (1) to form an avoiding channel between the cover plate assembly (2) and the shell assembly (1) for the liquid conveying port (311) of the cooling pipeline (31) to extend out of the first accommodating space.

5. The battery module according to claim 2, wherein the first cover plate (21) is provided with a glue injection hole (213) for filling glue to enter, and the glue injection hole (213) is communicated with the first accommodating space and the second accommodating space.

6. The battery module according to claim 1, wherein the housing assembly (1) comprises two oppositely arranged first protection plates (11) and two oppositely arranged second protection plates (12), and the two first protection plates (11) are clamped between the two second protection plates (12) to enclose the first accommodating space; the number of the cooling plates (3) is two, and the two cooling plates (3) are detachably mounted on the two first protection plates (11) respectively.

7. The battery module according to claim 6, wherein the first protection plate (11) is provided with a catching groove through which the cooling plate (3) is caught on the first protection plate (11).

8. The battery module according to claim 1, wherein the cooling pipeline (31) has two infusion ports (311) for flowing cooling fluid into or out of the cooling pipeline (31), both of the infusion ports (311) penetrate the cover plate assembly (2), and each of the infusion ports (311) is disposed toward a side surface of the housing assembly (1).

9. The battery module according to claim 1, wherein the battery pack (4) includes a spacer (41) and a cell, the spacer (41) has a spacing section (411) contacting the cell and a connecting section (412) contacting the cooling plate (3), the spacer (41) is plural, and the plurality of spacers (41) are provided at intervals.

10. The battery module according to claim 9, wherein a snap (221) is provided on the cover plate assembly (2), and the snap (221) is snapped with the spacer (41) so that the cover plate assembly (2) is mounted on the upper side of the battery pack (4).

11. The battery module according to claim 1, wherein the housing assembly (1) and the cover plate assembly (2) are made of a plastic material, the housing assembly (1) comprises a bottom plate (13) and a plurality of rib plates (14), and the plurality of rib plates (14) are arranged on the bottom plate (13) at intervals; and/or the cooling plate (3) is made of an aluminium alloy material.