CN220934187U - Battery module and battery system - Google Patents

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery module and a battery system. The above-mentioned battery module includes: the liquid cooling plates are arranged at intervals, a cooling liquid channel is arranged in each liquid cooling plate, a first accommodating space is formed between every two adjacent liquid cooling plates, a battery cell assembly is arranged in each first accommodating space and comprises a first battery cell and a second battery cell, the first surface of each first battery cell is connected with the liquid cooling plate, and the first surface of each second battery cell is connected with the liquid cooling plate. According to the battery module provided by the utility model, when the thermal runaway of the battery cells occurs, each battery cell only affects one adjacent battery cell, so that at most two battery cells in the battery system are ensured to be subjected to thermal runaway simultaneously, and as the large surfaces of the battery cells are contacted with the liquid cooling plate, part of heat generated by the thermal runaway of the battery cells can be absorbed by the liquid cooling plate and cooling liquid in the liquid cooling plate, the temperature of the thermal runaway battery cells can be reduced, and thus the thermal runaway of the battery cells is inhibited.

Description

Battery module and battery system

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module and a battery system.

Background

With the continuous development of new energy industry, the power battery technology is also continuously and iteratively updated. To further increase the energy density of the battery system. In the prior art, a high-nickel ternary battery is often adopted, a large battery core is adopted, and a battery system scheme of a battery Cell To Pack (CTP for short), a battery Chassis integration technology (CTC for short) and a battery Body integration technology (CTB for short) becomes a mainstream trend of the industry.

However, thermal runaway protection is a major concern for various businesses with the advent of high energy density, high capacity battery systems. How to control the thermal runaway influence of the battery cell to the minimum in time when the thermal runaway of the battery cell occurs, and reserve enough escape time for passengers becomes a difficult problem to be solved. In the prior art, when thermal runaway occurs in the battery cells in the battery system, high-temperature and high-pressure gas generated by the battery cells can rapidly spread, so that adjacent battery cells are subjected to thermal runaway one by one under the influence of the high-temperature and high-pressure gas, and the thermal runaway of the battery system is difficult to control.

Therefore, there is a need for a battery module and a battery system capable of solving the above problems.

Disclosure of utility model

The utility model provides a battery module and a battery system, which are used for solving the technical defect that the thermal runaway of the battery system is difficult to control in the prior art.

The utility model provides a battery module, comprising: the liquid cooling plates are arranged at intervals, a cooling liquid channel is arranged in each liquid cooling plate, a first accommodating space is formed between every two adjacent liquid cooling plates, a battery cell assembly is arranged in each first accommodating space and comprises a first battery cell and a second battery cell, the first surface of each first battery cell is connected with the liquid cooling plate, and the first surface of each second battery cell is connected with the liquid cooling plate.

According to the battery module provided by the utility model, the first battery cell and the second battery cell are arranged at intervals, and a limiting mechanism is arranged between the second surface of the first battery cell and the second surface of the second battery cell.

According to the battery module provided by the utility model, the limiting mechanism comprises at least one limiting plate.

According to the battery module provided by the utility model, the limiting plate is an epoxy resin plate.

The battery module provided by the utility model further comprises a fixing assembly, wherein the fixing assembly comprises a first side end plate, a middle end plate and a second side end plate, a second accommodating space is formed between the first side end plate and the middle end plate and between the second side end plate and the middle end plate, and the liquid cooling plate is arranged in the second accommodating space.

According to the battery module provided by the utility model, the first surface of the first electric core is directly connected with the liquid cooling plate through the heat conduction structural adhesive.

According to the battery module provided by the utility model, the first surface of the second electric core is connected with the liquid cooling plate through the heat conduction structural adhesive.

The present utility model also provides a battery system including: the battery box and any one of the battery modules are provided with a third accommodating space, and the battery module is arranged in the third accommodating space.

The battery system provided by the utility model further comprises a water inlet pipe, wherein the water inlet pipe comprises a water inlet main pipe and a plurality of water inlet branch pipes communicated with the water inlet main pipe, and the water inlet branch pipes are communicated with the cooling liquid channels.

According to the battery system provided by the utility model, the battery box comprises a bottom plate, a battery frame and a top plate which are sequentially stacked, and the third accommodating space is formed among the bottom plate, the top plate and the battery frame.

According to the battery module and the battery system, the plurality of liquid cooling plates are arranged at intervals, the plurality of independent first accommodating spaces are formed between the adjacent liquid cooling plates, and the battery core assembly is respectively arranged in each independent first accommodating space, so that when thermal runaway of the battery core occurs, each battery core only affects one adjacent battery core, at most, only two battery cores in the battery system are ensured to be in thermal runaway simultaneously, and because the large surfaces of the battery cores are in contact with the liquid cooling plates, part of heat generated by the thermal runaway of the battery cores can be absorbed by cooling liquid in the liquid cooling plates and the liquid cooling plates, the temperature reduction treatment of the thermal runaway battery cores can be carried out, and the thermal runaway spreading of the battery cores is restrained.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a battery module according to an embodiment of the present utility model;

fig. 2 is an exploded view of a battery module according to an embodiment of the present utility model

Fig. 3 is a schematic diagram of liquid cooling plates disposed at intervals in a battery module according to an embodiment of the present utility model;

Fig. 4 is an exploded view of a battery cell assembly in a battery module according to an embodiment of the present utility model;

fig. 5 is a schematic view of a battery system provided by an embodiment of the present utility model;

fig. 6 is an exploded view of a battery system according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a water inlet pipe in a battery system according to an embodiment of the present utility model;

Fig. 8 is a schematic view illustrating installation of a water inlet pipe in a battery system according to an embodiment of the present utility model;

Fig. 9 is a schematic view of a battery frame in a battery system according to an embodiment of the present utility model.

Reference numerals:

1. A liquid cooling plate; 2. a first cell; 3. a second cell; 4. a limiting plate; 5. a first side end plate; 6. an intermediate end plate; 7. a second side end plate; 8. a water inlet pipe; 801. a water inlet main pipe; 802. a water inlet branch pipe; 9. a bottom plate, 10, a battery frame; 1001. an outer frame; 1002. a cross beam; 1003. a longitudinal beam; 11. and a top plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The battery module and the battery system provided by the utility model are described below with reference to fig. 1 to 9.

As shown in fig. 1 to 3, the present utility model provides a battery module including: the liquid cooling board 1 that polylith interval set up is equipped with the coolant liquid passageway in the liquid cooling board 1, forms first accommodation space between the adjacent liquid cooling board 1, is equipped with electric core subassembly in the first accommodation space, and electric core subassembly includes first electric core 2 and second electric core 3, and the first surface of first electric core 2 is connected with liquid cooling board 1, and the first surface of second electric core 3 is connected with liquid cooling board 1.

In the specific embodiment of the present utility model, the battery cell adopts a square-shell battery cell, the structure is a short-cut battery cell, and the battery cell is provided with two side surfaces with larger areas, the first surface of the first battery cell 2 specifically refers to one of the two side surfaces of the first battery cell 2, and similarly, the first surface of the second battery cell 3 also specifically refers to one of the two side surfaces of the second battery cell 3. Through connecting the first surfaces of the first electric core 2 and the second electric core 3 with the corresponding liquid cooling plate 1 and conducting heat, the electric cores can be radiated through the liquid cooling plate 1 and the cooling liquid in the liquid cooling plate 1.

According to the battery module provided by the utility model, the plurality of liquid cooling plates 1 are arranged at intervals, a plurality of independent first accommodating spaces can be formed between the adjacent liquid cooling plates 1, and the battery cell assemblies are respectively arranged in the independent first accommodating spaces, so that when thermal runaway of the battery cells occurs, each battery cell only affects one adjacent battery cell, and therefore, at most, only two adjacent battery cells in the same battery cell assembly in a battery system are ensured to simultaneously generate thermal runaway, and as the battery cells are in large-scale contact with the liquid cooling plates 1, part of heat generated by the thermal runaway of the battery cells can be absorbed by cooling liquid in the liquid cooling plates 1 and the liquid cooling plates 1, and the thermal runaway of the battery cells can be cooled, so that the thermal runaway of the battery cells is restrained.

As shown in fig. 4, in the embodiment of the present utility model, in each of the battery cell assemblies, the first battery cell 2 and the second battery cell 3 are parallel to each other and are arranged at intervals, and a limiting mechanism is disposed between the second surface of the first battery cell 2 and the second surface of the second battery cell 3. Through setting up stop gear between the second surface of first electric core 2 and the second surface of second electric core 3, can at first carry out spacingly to first electric core 2 and second electric core 3, promote the holistic stability of battery module, secondly, stop gear can separate first electric core 2 and second electric core 3, reduces heat conduction heat exchange between first electric core 2 and the second electric core 3 to when one of them electric core thermal runaway, reduce the influence to another electric core. The second surface of the first cell 2 specifically refers to a side surface opposite to the first surface, and similarly, the second surface of the second cell 3 specifically refers to a side surface opposite to the first surface.

As shown in fig. 4, in a specific embodiment of the present utility model, the limiting mechanism includes at least one limiting plate 4, and in this embodiment, six limiting plates 4 are taken as examples, where two limiting plates 4 are vertically disposed on two sides (directions shown in fig. 4) of the second surface of the electrical core, and the other four limiting plates 4 are disposed between the two limiting plates 4 and are laterally symmetrically disposed on two sides of the second surface of the electrical core, so that a relatively stable limiting effect can be achieved on each part of the second surfaces of the first electrical core 2 and the second electrical core 3.

In some embodiments, an expansion space may be reserved between the limiting plate 4 and the first and second electric cores 2 and 3, so as to ensure that the battery module can normally operate under the working condition when breathing.

In a further embodiment of the utility model, the limiting plate 4 is an epoxy plate. The epoxy resin plate is made of epoxy resin, the epoxy resin is a linear or branched low molecular polymer, epoxy groups are arranged at two ends of the molecule, and aryl, alkyl, hydroxyl and ether bond are arranged on the main chain of the molecule. Epoxy groups and hydroxyl groups can react with functional groups and can provide good connectivity. Ether linkages may provide good chemical resistance, aryl groups may provide good high temperature resistance and rigidity, and methyl groups may provide good flexibility. Therefore, the adoption of the limiting plate 4 and the epoxy resin plate can have good high-temperature resistance, rigidity and flexibility.

As shown in fig. 1 to 3, the battery module provided in some embodiments of the present utility model further includes a fixing assembly, where the fixing assembly includes a first side end plate 5, a middle end plate 6, and a second side end plate 7, and a second accommodating space is formed between the first side end plate 5 and the middle end plate 6, and between the second side end plate 7 and the middle end plate 6, and the liquid cooling plate 1 is disposed in the second accommodating space. Through setting up first side end plate 5, middle end plate 6 and second side end plate 7 to form the second accommodation space, can fix liquid cooling board 1 and the electric core subassembly that sets up in the second accommodation, can effectively prevent that the battery module from taking place to crooked, collapsing in transport and use.

In some embodiments, a plurality of middle end plates 6 may be further disposed, and the second accommodating space is formed between adjacent middle end plates 6. Can play effectual fixed action to liquid cooling board 1 and electric core subassembly under the more circumstances of liquid cooling board 1 and electric core subassembly.

In the embodiment of the utility model, the first surface of the first electric core 2 is directly connected with the liquid cooling plate 1 through heat conduction structural adhesive. The first surface of the second electric core 3 is connected with the liquid cooling plate 1 through heat conduction structural adhesive. Adopt heat conduction structure to glue the large tracts of land and the liquid cooling board 1 of electricity core, not only can play better fixed connection effect to the electricity core, can strengthen the heat conduction efficiency between electricity core and the liquid cooling board 1 moreover, promote the cooling effect of electricity core.

In some embodiments, the first battery cell 2 and the second battery cell 3 may be adhered and fixed by using double-sided adhesive (taking epoxy board double-sided adhesive as an example) or heat-conducting structural adhesive. In this way, a plurality of electric core cooling modules taking the liquid cooling plate-heat conducting structural adhesive-first electric core-epoxy resin plate-second electric core-heat conducting structural adhesive-liquid cooling plate as basic units as shown in fig. 4 can be formed in the battery module, and one large surface of each of the first electric core 2 and the second electric core 3 can be in heat conducting connection with the corresponding liquid cooling plate 1 through the heat conducting structural adhesive. Adjacent battery core cooling modules are connected through heat conduction structural adhesive and form a whole, and then the whole is fixed through the first side end plate 5, the middle end plate 6 and the second side end plate 7, so that a battery module with a stable structure is formed.

As shown in fig. 5 and 6, the present utility model also provides a battery system including: the battery box and the battery module according to any one of the embodiments, wherein the battery box is provided with a third accommodating space, and the battery module is disposed in the third accommodating space.

As shown in fig. 7, the battery system provided in some embodiments of the present utility model further includes a water inlet pipe 8, the water inlet pipe 8 including a water inlet main 801 and a plurality of water inlet branch pipes 802 communicating with the water inlet main 801, the water inlet branch pipes 802 communicating with the coolant channel. Specifically, the cooling liquid channels of each liquid cooling plate 1 are respectively communicated with the corresponding water inlet branch pipes 802, each liquid cooling plate 1 can form a parallel connection mode, and cooling liquid can be simultaneously introduced into each liquid cooling plate 1 through the water inlet branch pipes 802 by introducing the cooling liquid into the water inlet main pipe 801, so that the structure is simple, and the practicability is strong.

In the embodiment of the utility model, the battery box comprises a bottom plate 9, a battery frame 10 and a top plate 11 which are sequentially stacked, and a third accommodating space is formed among the bottom plate 9, the top plate 11 and the battery frame 10. Specifically, as shown in fig. 9, the battery frame 10 includes an outer frame 1001, and cross beams 1002 and longitudinal beams 1003 are provided on the inner side of the outer frame 1001 in a staggered manner, and as an example, three cross beams 1002 and one longitudinal beam 1003 are provided on the inner side of the outer frame 1001, and four sub-installation spaces for installing the battery module are formed together with the battery frame 10, and an installation space for installing a water inlet pipe is reserved between the cross beams 1002 and the battery frame, as shown in fig. 8. The bottom plate 9 may be fixed by FDS (Flow DRILL SCREW, rotational tapping and riveting process) or by bolts to connect the cross member 1002 and the side member 1003, and when the battery case bottom plate 9 is fixed by bolts, the top plate 11 may be fixed by bolts to the lower case of the battery case. In addition, in specific implementation, the bottom plate 9, the battery frame 10 (including the battery module) and the top plate 11 can be glued to form a whole by adopting a structural adhesive, so that the overall strength of the battery box can be greatly improved.

According to the battery system provided by the embodiment of the utility model, through arranging the battery module, a plurality of independent first accommodating spaces can be formed between the adjacent liquid cooling plates 1 by arranging the plurality of liquid cooling plates 1 at intervals, and the battery cell assemblies are respectively arranged in the independent first accommodating spaces, when the thermal runaway of the battery cells occurs, each battery cell only affects one adjacent battery cell, so that the thermal runaway of at most two adjacent battery cells in the same battery cell assembly in the battery system is ensured, and because the large surfaces of the battery cells are contacted with the liquid cooling plates 1, part of heat generated by the thermal runaway of the battery cells can be absorbed by cooling liquid in the liquid cooling plates 1 and the liquid cooling plates 1, and the thermal runaway of the battery cells can be cooled, thereby inhibiting the thermal runaway of the battery cells.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A battery module, comprising: the liquid cooling plates are arranged at intervals, a cooling liquid channel is arranged in each liquid cooling plate, a first accommodating space is formed between every two adjacent liquid cooling plates, a battery cell assembly is arranged in each first accommodating space and comprises a first battery cell and a second battery cell, the first surface of each first battery cell is connected with the liquid cooling plate, and the first surface of each second battery cell is connected with the liquid cooling plate.

2. The battery module of claim 1, wherein the first cell is spaced apart from the second cell, and a limiting mechanism is disposed between the second surface of the first cell and the second surface of the second cell.

3. The battery module of claim 2, wherein the limiting mechanism comprises at least one limiting plate.

4. The battery module according to claim 3, wherein the limiting plate is an epoxy plate.

5. The battery module of claim 1, further comprising a fixing assembly comprising a first side end plate, a middle end plate, and a second side end plate, wherein a second accommodation space is formed between the first side end plate and the middle end plate, and between the second side end plate and the middle end plate, and the liquid cooling plate is disposed in the second accommodation space.

6. The battery module of any one of claims 1 to 5, wherein the first surface of the first cell is directly connected to the liquid cooling plate by a thermally conductive structural adhesive.

7. The battery module of any one of claims 1 to 5, wherein the first surface of the second cell is connected to the liquid cooling plate by a thermally conductive structural adhesive.

8. A battery system, comprising: battery box and battery module according to any one of claims 1 to 7, the battery box being provided with a third accommodation space in which the battery module is disposed.

9. The battery system of claim 8, further comprising a water inlet pipe comprising a water inlet stem pipe and a plurality of water inlet branches in communication with the water inlet stem pipe, the water inlet branches in communication with the coolant channel.

10. The battery system according to claim 8 or 9, wherein the battery case includes a bottom plate, a battery frame, and a top plate that are stacked in this order, the bottom plate, the top plate, and the battery frame forming the third accommodation space therebetween.