CN211829072U - Battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery package and vehicle. The battery pack comprises a battery module and a cooling device, wherein each layer of battery direct-connection group in the battery module at least comprises two battery direct-connection groups which are arranged side by side at intervals, each battery direct-connection group comprises a battery core stacking body, each battery core stacking body comprises a plurality of soft-packaged battery cores formed by series-connected electrode core groups, first electrode lug supports are arranged at two ends of each battery direct-connection group, two adjacent battery direct-connection groups which are arranged side by side are connected with the first electrode lug supports at the same end, and an accommodating space is defined between the two battery direct-connection groups and the first electrode lug supports at two ends; the liquid cooling plate is directly connected the laminating of group layer and battery module with the battery and/or the liquid cooling plate has been arranged to the lower surface, and the liquid cooling plate encloses synthetic holding tank with accommodation space, and the heat-conducting plate links to each other with the liquid cooling plate and inserts in the holding tank, and this holding tank is by another liquid cooling plate or guard plate involution, and the heat-conducting glue sets up directly even between group and heat-conducting plate at the battery. The battery pack has the advantages of simple internal structure, high unit volume capacity density, high heat conduction efficiency and easy adjustment of height.

Description

Battery pack and vehicle

Technical Field

The utility model belongs to the power battery field particularly, relates to battery package and vehicle.

Background

The liquid cooling battery module performance has directly decided the equipment performance that adopts this liquid cooling battery module as power source good and bad, but the laminate polymer battery liquid cooling system design degree of difficulty is big, often adopt heat-conducting plate contact laminate polymer battery, a heat-conducting plate contact electric core or two electric cores share a heat-conducting plate, the heat-conducting plate is derived the heat of electric core from electric core thickness direction, this kind of mode not only heat conduction efficiency is low, still can increase battery weight, and electric core quantity is more, the heat-conducting plate quantity is more, the equipment is also complicated more. And expect the height of battery package to constantly reduce in the trade at present, but traditional laminate polymer battery often adopts the mode of assembling immediately, and the height of module is often higher like this, and because laminate polymer battery's multiple requirements such as manufacturing process and cost can't reduce the height again, are difficult to adapt to the requirement that the battery system height reduces. In addition, because the length of electric core is generally about 0.3 meter on the market at present, lead to battery module more in the current power battery package, and all need add fixed knot to every battery module, the equipment is complicated, need carry out power connection through the power connecting piece of peripheral hardware between two adjacent battery modules simultaneously to lead to battery mounting structure more, not only with high costs, battery package whole weight is big and space utilization is low moreover, leads to battery package volume capacity density lower.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. To this end, an object of the present invention is to provide a battery pack and a vehicle. Compared with the prior art, the battery pack is simple in internal structure, large in unit volume capacity density, high in heat conduction efficiency, good in cooling effect, convenient to assemble and capable of meeting the requirements of capacity improvement and height reduction of the battery system better.

According to the utility model discloses a first aspect, the utility model provides a battery package. According to the utility model discloses an embodiment, this battery package includes:

the battery module comprises at least one layer of battery direct connection group layer, each layer of battery direct connection group layer at least comprises two battery direct connection groups, each battery direct connection group comprises one or more battery cell stacking bodies, each battery cell stacking body respectively and independently comprises a plurality of soft package battery cells stacked horizontally, each soft package battery cell comprises a plurality of serially connected pole core groups, and each pole core group comprises at least one pole core; the plurality of battery direct-connection groups in each battery direct-connection group layer are arranged side by side at intervals, two ends of each battery direct-connection group distributed along the length direction of the battery direct-connection group are respectively and independently provided with a first tab support, two first tab supports at the same end of two adjacent battery direct-connection groups arranged side by side are connected, and an accommodating space is defined between the two battery direct-connection groups and the first tab supports at the two ends;

cooling device, cooling device includes liquid cold plate, heat-conducting plate and heat conduction glue, the liquid cold plate with the battery directly links the group layer thermal contact just battery module upper surface and/or lower surface have arranged the liquid cold plate, the liquid cold plate with accommodation space encloses and closes the formation holding tank, the heat-conducting plate with the liquid cold plate stationary phase links to each other and inserts in the holding tank and this holding tank is by another liquid cold plate or guard plate involution, arbitrary two adjacent and arrange side by side the battery directly links to each other and has arranged between the group the heat-conducting plate, the heat conduction glue sets up the battery directly link the group with between the heat-conducting plate, the heat-conducting plate is in projection on the liquid cold plate is wave line or Z shape zigzag line.

The utility model discloses above-mentioned embodiment's battery package has following advantage at least: 1) through connecting a plurality of pole core groups in series, the soft-packaged battery core can have certain strength on the basis of improving the length of the soft-packaged battery core, and the soft-packaged battery core is prevented from being too soft, so that the assembly of a battery module is facilitated, the length of a single battery core stacking body can be obviously improved, and the fixing structures between a battery direct-connection group and a multilayer battery direct-connection group layer in unit battery volume are greatly reduced, so that the overall weight and cost of the battery module and a battery pack can be reduced, and the space utilization rate and the battery capacity of the battery can be obviously improved; 2) the battery cell stacking body adopts a mode that the battery cells are horizontally laid, namely a plurality of battery cells are stacked along the height direction of the battery module, so that the height requirement of the battery pack can be met by adjusting the stacking thickness of a plurality of layers of battery cells in the battery cell stacking body and the number of layers of the battery direct-connected module layer; 3) the cooling adopts a mode that heat-conducting glue is directly filled in gaps between the heat-conducting plate and the stacked battery core body to directly contact the battery core, and the heat-conducting glue is filled and distributed on the side surfaces of all the parallel battery cores in the stacked battery core body, so that the cooling efficiency is higher; 4) the liquid cooling plate and the heat conducting plate can be fixed by utilizing the stacking structure of the battery module, and the inherent structure of the battery pack is utilized to replace a part for supporting and fixing the cooling device, so that the heat dissipation efficiency of the battery can be improved, the internal structure of the battery can be simplified, and the cost of the battery can be reduced; 5) the protective plate structure of the existing battery module can be replaced by the liquid cooling plate, so that the liquid cooling plate has cooling and protective effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, so that the cooling effect can be improved, and the internal structure of the battery can be simplified; 6) two adjacent battery direct-connection groups arranged in parallel can be enabled to share one heat conduction plate, even two adjacent battery direct-connection groups arranged side by side in a plurality of battery direct-connection group layers can share one heat conduction plate, so that the number of the heat conduction plates in the cooling device can be greatly reduced, and the internal structure of the battery is simpler; 7) the projection of the heat conducting plate on the liquid cooling plate is a curve, so that the contact area of the heat conducting plate, the heat conducting glue and the liquid cooling plate can be further increased, and the cooling efficiency is further increased. Compared with the prior art, a plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction glue with the contact of laminate polymer battery core and with electric core heat direct transfer for liquid cooling board derivation, not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that the adaptation battery system height that can also be better reduces.

In addition, the battery pack according to the above embodiment of the present invention may further have the following additional technical features:

optionally, two of arbitrary series connection in the soft-packaged cell the junction of utmost point core group is equipped with the structure respectively independently and glues, the structure glue with the bonding of soft-packaged cell casing and inciting somebody to action soft-packaged cell is separated for a plurality of relatively independent accommodation space, every accommodation space holds one utmost point core group.

Optionally, the soft package battery core comprises 2-4 electrode core groups connected in series, the length of the battery stack body is not less than 600mm, and each battery direct connection group comprises 1-3 battery stack bodies connected in series.

Optionally, the group is directly connected to the battery includes one the electricity core stack body or include a plurality of series connection the electricity core stack body, every series connection department is equipped with second utmost point ear support independently respectively, be equipped with first through-hole on the first utmost point ear support, be equipped with the second through-hole on the second utmost point ear support, every row in the battery module the group layer is directly connected to the battery is equipped with by a plurality of along its direction of height be equipped with on the group layer first through-channel that first through-hole formed and by a plurality of the second through-channel that the second through-hole formed, the multilayer the group layer is directly connected to the battery passes through first through-channel and/or the second is penetrated the passageway and is fixed linking to each other.

Optionally, two adjacent straight battery connecting groups arranged side by side in each layer of straight battery connecting group are welded and connected through the first tab support; or, be equipped with the third through-hole on the first utmost point ear support, every layer the battery directly links the group layer and follows the battery directly links the direction that the group was arranged side by side and is equipped with by a plurality of the third through-channel that the third through-hole formed, every layer the battery directly links the group layer and passes through the third through-channel is fixed continuous.

Optionally, be equipped with on the liquid cooling board with first through-channel and/or the second through-channel corresponds fourth through-hole and/or first arch, be equipped with on the guard plate with first through-channel and/or the second through-channel corresponds fifth through-hole and/or second arch, the liquid cooling board passes through fourth through-hole and/or first arch with battery directly links to each other group layer is fixed, the guard plate passes through fifth through-hole and/or second arch with battery directly links to each other group layer is fixed.

Optionally, the battery module comprises two liquid cooling plates which are respectively arranged on the upper surface and the lower surface of the battery module; or, the protection plate is arranged on the lower/upper surface of the battery module, and the liquid cooling plate is arranged on the upper/lower surface of the battery module; or, including two guard plates and one the liquid cooling board, two the guard plate is arranged respectively battery module lower surface and upper surface, the liquid cooling board is arranged adjacent two-layerly the battery directly links between the group layer.

Optionally, the protection plate and the liquid cooling plate are respectively and independently provided with a clamping groove formed by two limiting bars, and the clamping groove is suitable for limiting the heat conducting plate on the other liquid cooling plate.

Optionally, the heat conducting plate and the liquid cooling plate are integrally formed.

According to a second aspect of the present invention, the utility model provides a vehicle. According to the utility model discloses an embodiment, this vehicle includes foretell battery package. Power battery's radiating effect is good, light in weight in this vehicle, and duration is stronger and more stable.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of the internal structure of a battery pack according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a single layer direct battery stack layer according to an embodiment of the present invention.

Fig. 3 is a plan view of a single layer direct battery stack layer according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a battery cell stack (or a battery cell stack) according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a soft-packaged battery cell according to an embodiment of the present invention.

Fig. 6 is an internal structure schematic diagram of a soft-packaged battery cell according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a first tab holder in two adjacent battery direct connection groups arranged side by side according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a second ear support in two adjacent battery direct-connection groups arranged side by side according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a liquid-cooled panel according to an embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a guard plate according to an embodiment of the present invention.

Fig. 11 is a schematic diagram of the internal structure of a battery pack according to still another embodiment of the present invention.

Fig. 12 is a schematic diagram of the internal structure of a battery pack according to still another embodiment of the present invention.

Fig. 13 is a schematic diagram of the internal structure of a battery pack according to still another embodiment of the present invention.

Fig. 14 is a schematic diagram of the relative positions of the thermal insulation foam and the battery direct connection layer according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a soft-packaged electric core according to another embodiment of the present invention.

Fig. 16 is an internal structure diagram of a soft-packaged electric core according to another embodiment of the present invention.

Fig. 17 is a schematic structural view of a slot in a liquid cooling plate or a protection plate according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "attached," "secured," and the like are to be construed broadly and can include, for example, a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The term "thermal contact" may be direct contact or indirect contact through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

According to the utility model discloses a first aspect, the utility model provides a battery package. According to the utility model discloses an embodiment, it is shown with reference to fig. 1 ~ 9, this battery package includes: a battery module 100 and a cooling device 200. The battery module 100 comprises at least one battery direct connection group layer 110, each battery direct connection group layer 110 at least comprises two battery direct connection groups 111, each battery direct connection group 111 comprises one or more battery cell stacked bodies A, each battery cell stacked body A respectively and independently comprises a plurality of soft package battery cells A1 stacked in a lying manner, each soft package battery cell A1 comprises a plurality of pole core groups A2 connected in series, and each pole core group A2 comprises at least one pole core; a plurality of battery direct-connection groups 111 in each battery direct-connection group layer 110 are arranged side by side at intervals, two ends of each battery direct-connection group 111 distributed along the length direction of the battery direct-connection group are respectively and independently provided with a first tab support 112, two first tab supports 112 at the same end of two adjacent battery direct-connection groups 111 arranged side by side are connected, an accommodating space is defined between the two battery direct-connection groups 111 and the first tab supports 112 at the two ends, wherein the two first tab supports 112 can be jointed and connected, so that a gap is formed between any two adjacent battery direct-connection groups arranged side by side; cooling device 200 includes heat conduction glue 210, heat-conducting plate 220 and liquid cooling plate 230, liquid cooling plate 230 and the direct group layer 110 thermal contact of battery and battery module 110 upper surface and/or lower surface have arranged liquid cooling plate 230, 2 liquid cooling plate 230 encloses with accommodation space and forms holding tank 120, heat-conducting plate 220 links to each other with the fixed phase of liquid cooling plate 230 and inserts in holding tank 120 and this holding tank 120 is closed by another liquid cooling plate 230 or protection plate 300, heat-conducting plate 220 has been arranged to arbitrary two adjacent and the battery that arranges side by side is directly even between organizing 111, heat conduction glue 210 sets up between battery is directly organizing 111 and heat-conducting plate 220, the projection of heat-conducting plate 220 on liquid cooling plate 230 is wave line or Z shape zigzag. Compared with the prior art, the battery pack is simple in internal structure, large in unit volume capacity density, high in heat conduction efficiency, good in cooling effect, convenient to assemble and capable of meeting the requirements of capacity improvement and height reduction of the battery system better. Note that the liquid cooling plate has a cooling liquid passage built therein and the heat conducting plate does not have a cooling liquid passage.

The battery pack according to the above embodiment of the present invention will be described in detail with reference to fig. 1 to 17.

According to a specific embodiment of the present invention, as shown in fig. 6, the flexible package battery cell a1 can include 2-4 serially connected pole core groups a2, for example, the number of serial connections can be 2, 3 or 4, the serially connected pole core groups a2 can be connected by welding or riveting with positive and negative electrode lugs, in the present invention, the length of the flexible package battery cell and the single battery cell stacked body is increased by connecting the pole core groups in series, so as to achieve the purpose of significantly increasing the space utilization rate and battery capacity of the battery pack, but the number of the serially connected pole core groups can cause the whole flexible package battery cell to be too soft, which is not beneficial for the assembly of the battery module, the flexible package battery cell can have a longer length and a suitable strength by controlling the number of the serial connections of the pole core groups in the single flexible package battery cell to be 2-4, thereby simplifying the internal structure of the battery and greatly reducing the assembly accessories of the battery module, the battery pack has high space utilization rate and battery capacity, the battery cost and weight can be reduced, and the battery assembly process is simplified. Preferably, the length of single utmost point core group A2 can be 200 ~ 450mm, for example can be 200mm, 250mm, 300mm, 350mm or 400mm etc, the length of utmost point core group is decided by the utmost point core, the utmost point core in every utmost point core group is formed by a plurality of pole pieces, the pole piece is longer its yield lower and the utmost point core group under the unit thickness is softer more, and still can show the technological degree of difficulty that improves the pole piece and stack after increasing pole piece length, consequently the length of single utmost point core group is unsuitable overlength, the utility model discloses in can further ensure soft package electricity core to have suitable intensity for above-mentioned length scope through control utmost point core group.

According to the utility model discloses a still another embodiment, the length of electric core stack body A can be not less than 600mm, for example can be for 600mm, 800mm, 1000mm, 1200mm or 1500mm etc., preferred 600 ~ 1300mm, soft-packaged electric core's thickness can be for 10 ~ 15mm, both can improve the yield from this, can avoid single utmost point core group overlength or the utmost point core group number of establishing ties too much and lead to soft-packaged electric core too soft again to make soft-packaged electric core have longer length and suitable intensity concurrently. Furthermore, each battery direct connection group can comprise 1-3 battery cell stacking bodies connected in series, so that the internal structure of the battery can be effectively simplified, the assembly accessories of the battery module can be greatly reduced, the battery pack has high space utilization rate and battery capacity, the cost and weight of the battery can be reduced, and the battery assembly process is simplified.

According to the utility model discloses a still another embodiment, as shown in fig. 15 and fig. 16, the fixed connection department of two arbitrary series connection's utmost point core group A2 is equipped with the structure respectively independently in the soft-packing electricity core A1 and glues A3, and the structure is glued A3 and is glued with soft-packing electricity core casing and separate soft-packing electricity core casing for a plurality of relatively independent accommodation space, and every accommodation space holds an utmost point core group A2. Make laminate polymer core casing separate for a plurality of independent accommodation space through utilizing the structure to glue, not only separate the structure more simple, need not to set up other spacer elements, electrolyte takes place to decompose and then leads to the problem that the battery became invalid because of the potential difference is too high when can also avoiding appearing a plurality of utmost point core group sharing electrolyte.

According to the utility model discloses a still another embodiment, the utility model discloses a number of piles of battery straight connecting group layer 110 and every layer of battery straight connecting group layer 110 in battery module 100 electric core stack A's number do not receive special restriction, and the skilled person in the art can select according to the actual demand. For example, the battery pack can comprise 1-6 battery direct connection group layers, each battery direct connection group layer can comprise 2-6 battery direct connection groups, each battery direct connection group can comprise 1-3 battery stacking bodies connected in series, for example, 1 or 2 battery stacking bodies connected in series, and therefore the battery pack can be more suitable for the requirements of the existing new energy automobile on the height and the capacity of the power battery pack.

According to the utility model discloses a still another concrete embodiment, the battery directly links the arrangement and the number homogeneous phase of group 111 in every layer of battery directly links group layer 110, and adjacent two-layer battery directly links group layer 110 and can establish ties the setting, and the battery directly links group 110 in every layer of battery directly links group layer 110 and can connect the setting in parallel. A plurality of soft-packaged electric core A1 can stack through the structure gluing in every electric core stack body A, and the polarity that piles up electric core both ends is the same, forms the electric core stack body that has a plurality of parallelly connected electric cores, and electric core stack body series welding or riveting are got up and are formed the battery and directly link the group. The soft package battery cell comprises a soft package battery cell, wherein a plurality of battery packs are connected in series, each battery pack comprises a plurality of battery packs, each battery pack is provided with a positive electrode lug and a negative electrode lug, each positive electrode lug can be aluminum and/or aluminum alloy, the plurality of positive electrode lugs are connected in parallel to serve as positive electrodes, the negative electrode lugs can be copper and/or copper alloy, the plurality of negative electrode lugs are connected in parallel to serve.

According to the utility model discloses a specific embodiment, the battery directly links group 111 can include an electric core stack A or the electric core stack A that includes a plurality of series connection, and every series connection department between the electric core stack can be equipped with second utmost point ear support 113 respectively independently, and first utmost point ear support 112 and second utmost point ear support 113 can be the insulating plastic support respectively independently, not only can further be favorable to improving the security and the reliability of battery from this, can also reduce the whole weight of battery. It should be noted that the first tab support 112 and the second tab support 113 may be used for supporting the tabs independently, and may be fixedly connected to the adjacent battery direct connection group (layer), the liquid cooling plate, and the protection plate, where the connection may be welding or riveting, such as laser welding, ultrasonic welding, or screw and rivet connection. Two first tab brackets 112 positioned at the same end of any two adjacent battery direct connection groups 111 arranged side by side can be welded or jointed through screw and bolt connection.

According to another embodiment of the present invention, as shown in fig. 7 and 8, a first through hole 114 may be disposed on the first tab support 112, a second through hole 115 may be disposed on the second tab support 113, a first through channel (not shown) formed by a plurality of first through holes 114 and a second through channel (not shown) formed by a plurality of second through holes 115 are disposed along the height direction of each row of the battery direct connection group layers 111 in the battery module, and the multilayer battery direct connection group layers 111 are fixedly connected through the first through channel and/or the second through channel. It should be noted that the battery straight-connected groups in the battery module are stacked in rows along the height direction of the module.

According to another embodiment of the present invention, two adjacent battery direct connection groups 111 arranged side by side in each battery direct connection group layer 110 are welded and connected by a first tab bracket 112; or, as shown in fig. 13, third through holes 116 are formed in the first tab support 112, a third through channel (not shown) formed by a plurality of third through holes 116 is formed in each layer of the direct battery connection group layer along the direction in which the direct battery connection groups are arranged side by side, and each layer of the direct battery connection group layer is fixedly connected through the third through channel. Therefore, the fixed connection of each battery direct connection group layer can be realized.

According to another embodiment of the present invention, as shown in fig. 9 and 10, a fourth through hole and/or a first protrusion 231 corresponding to the first through channel and/or the second through channel may be disposed on the liquid cooling plate 230, a fifth through hole and/or a second protrusion 310 corresponding to the first through channel and/or the second through channel may be disposed on the protection plate 300, the liquid cooling plate 230 is fixedly connected to the battery direct connection layer 110 through the fourth through hole and/or the first protrusion 231, and the protection plate 300 is fixedly connected to the battery direct connection layer 110 through the fifth through hole and/or the second protrusion 310. From this not only can realize liquid cold drawing and guard plate and the fixed connection on the group layer is directly connected to the battery, can also improve the stability of whole battery module. Further, the position of connection on the guard plate 300 and the battery direct connection group layer can also be further provided with a reinforcing rib, so that the fixing strength of the guard plate and the battery module can be further improved, and the protection effect is improved simultaneously.

According to another embodiment of the present invention, each liquid-cooled plate 230 may independently contain a plurality of coolant channels, and the plurality of coolant channels share a coolant inlet 232 and a coolant outlet 233. Therefore, the circulating flow of the cooling liquid in the liquid cooling plate can be accelerated, the heat of the battery module is taken away quickly through the cooling liquid, the cooling effect is improved, and the structure of the cooling device can be further simplified. As shown in fig. 9, the coolant inlet 232 and the coolant outlet 233 may be disposed at both sides of the liquid-cooled plate 230 in the direction of the length of the battery direct pack, respectively, preferably such that the coolant inlet 232 and the coolant outlet 233 are disposed adjacent to the junction of the liquid-cooled plate 230 and the first tab holder 112. Further, as shown in fig. 10, the shielding plate 300 may further include a shielding region 320 corresponding to the cooling fluid inlet/outlet.

According to the utility model discloses a still another embodiment, every layer of battery directly links group layer 110 can share a liquid cooling board 230, and two adjacent batteries that arrange side by side in at least one layer of battery directly links group 111 and shares a heat-conducting plate 220 in the group layer 110. Therefore, the liquid cooling plate structure can be further simplified, the number of the heat conducting plates can be reduced, the heat radiating efficiency of the electric core can be ensured, the heat of each electric core can be timely transmitted to the heat conducting glue and transmitted to the liquid cooling plate through the heat conducting plates, and the heat is taken away by the cooling liquid in the liquid cooling plate.

According to still another embodiment of the present invention, referring to fig. 1, the battery module may include two liquid cooling plates 230, the two liquid cooling plates 230 are respectively disposed on the upper surface and the lower surface of the battery module 100, specifically, one liquid cooling plate 230 is in thermal contact with the lower surface of the battery module 100 and the heat conducting plate 220 is inserted into the accommodating groove 120 upward, and the other liquid cooling plate 230 is in thermal contact with the upper surface of the battery module 100 and the heat conducting plate 220 is inserted into the accommodating groove 120 downward. From this can be with the guard plate complete replacement of current battery module for the liquid cooling board to utilize the inherent structure of battery module and inherent part to replace the part that supports fixed cooling device, make the liquid cooling board have cooling and protective effect concurrently, thereby can increase cooling part and ensure protective effect on the basis that does not increase current battery module structure, reached and can improve cooling efficiency, can simplify the effect of battery inner structure and reduction battery cost again.

According to another embodiment of the present invention, referring to fig. 11 or 12, the battery module may include a protection plate 300 and a liquid cooling plate 230, the protection plate 300 is disposed on the lower/upper surface of the battery module 100, the liquid cooling plate 230 is disposed on the upper/lower surface of the battery module, that is, the protection plate 300 is attached to the lower surface of the bottom battery direct connection assembly layer, the liquid cooling plate 230 is in thermal contact with the upper surface of the top battery direct connection assembly layer, and the heat conduction plate 220 is inserted into the accommodation groove 120 downward; alternatively, the protection plate 300 is attached to the upper surface of the top-most direct battery pack layer, the liquid cooling plate 230 is in thermal contact with the lower surface of the bottom-most direct battery pack layer, and the heat conducting plate 220 is inserted into the receiving groove 120 upward. From this can utilize the liquid cooling board to replace one of them guard plate to utilize the inherent structure of battery module and inherent part to replace the part that supports fixed cooling device, make this cooling board have cooling and protective effect concurrently, thereby can improve cooling efficiency, can effectively protect the electric core in the electric core stack body again, damage electric core or heat-conducting glue when avoiding transportation or equipment are because of overflowing that the battery module vibration leads to in the operation process.

According to another embodiment of the present invention, referring to fig. 13, the battery module may include two protection plates 300 and a liquid cooling plate 230, the two protection plates 300 are respectively disposed on the lower surface and the upper surface of the battery module 100, the liquid cooling plate 230 is disposed between two adjacent battery direct connection layers, that is, the two protection plates 300 are respectively disposed on the lower surface of the bottom battery direct connection layer and the upper surface of the top battery direct connection layer, the liquid cooling plate 230 is disposed between two adjacent battery direct connection layers 110, and one part of the heat conduction plate 220 is inserted into the accommodation groove 120 above the liquid cooling plate upward, and the other part of the heat conduction plate 220 is inserted into the accommodation groove 120 below the liquid cooling plate downward. Adopt this mode can ensure that the heat in the pile body of electric core can be derived fast on the basis that does not change current battery module protective structure. Further, the protection plate 300 may further have a clamping portion matched with the heat conduction plate.

According to the utility model discloses a still another embodiment, can be equipped with on the liquid cooling board 230 with another liquid cooling board 230 on heat-conducting plate assorted joint portion, joint portion can be limiting plate or spacing, from this can make two liquid cooling boards mutual joint of arranging from top to bottom, thereby can guarantee the radiating efficiency, can also make reciprocal anchorage between the liquid cooling board, guarantee the involution effect of holding tank and liquid cooling board, avoid the thermal conductivity glue because of battery module in the operation overflow that the in-process vibration leads to, further improve the stability of whole battery module on the basis of not increasing extra fixed annex. For example, as shown in fig. 17, the protection plate 300 and/or the liquid cooling plate 230 may be respectively and independently provided with a clamping groove 500, the clamping groove is formed by two limiting bars and is suitable for limiting the heat conducting plate of another liquid cooling plate, so that not only the stability of the whole battery module can be further improved, but also the limiting structure can be further simplified compared with a limiting groove.

According to the utility model discloses a still another embodiment, as shown in fig. 14, can be respectively independent between the group layer 110 adjacent two-layer battery directly link to be equipped with thermal-insulated bubble cotton 400, can be equipped with thermal-insulated bubble cotton 400 between liquid cooling board 230 and arbitrary one electric core stack A, can be equipped with thermal-insulated bubble cotton 400 between guard plate 300 and arbitrary one battery directly link to be organized the layer A, thermal-insulated bubble cotton 400 ends in first utmost point ear support and/or second utmost point ear support. From this can make two upper and lower faces of each electric core stack body A all be formed with thermal-insulated bubble cotton to can separate the electric core heat conduction route between each electric core stack body, the difference in temperature is too big between the electric core when avoiding heat conduction.

According to the utility model discloses a still another embodiment, heat-conducting plate 220 and liquid cold drawing 230 can integrated into one piece, or form integratively through the welding, ensure that the two is connected the position heat conduction and is contacted well, no air gap, wherein, the welding can adopt welding methods such as soldering, argon arc welding. In addition, the heat conducting plate and the liquid cooling plate can be made of metal with good heat conduction, such as aluminum and aluminum alloy, copper and copper alloy, and the like.

According to the utility model discloses a still another embodiment, heat-conducting glue can be heat-conducting gel, and heat-conducting gel coefficient of heat conductivity is not less than 1W/m K, can further improve cooling device's radiating effect from this.

To sum up, the utility model discloses above-mentioned embodiment's battery package has following advantage at least: 1) through connecting a plurality of pole core groups in series, the soft-packaged battery core can have certain strength on the basis of improving the length of the soft-packaged battery core, and the soft-packaged battery core is prevented from being too soft, so that the assembly of a battery module is facilitated, the length of a single battery core stacking body can be obviously improved, and the fixing structures between a battery direct-connection group and a multilayer battery direct-connection group layer in unit battery volume are greatly reduced, so that the overall weight and cost of the battery module and a battery pack can be reduced, and the space utilization rate and the battery capacity of the battery can be obviously improved; 2) the battery cell stacking body adopts a mode that the battery cells are laid horizontally, so that the height requirement of the battery pack can be met by adjusting the stacking thickness of a plurality of layers of battery cells in the battery cell stacking body and the number of layers of the direct battery pack; 3) the cooling adopts a mode that heat-conducting glue is directly filled in gaps between the heat-conducting plate and the stacked battery core body to directly contact the battery core, and the heat-conducting glue is filled and distributed on the side surfaces of all the parallel battery cores in the stacked battery core body, so that the cooling efficiency is higher; 4) the liquid cooling plate and the heat conducting plate can be fixed by utilizing the stacking structure of the battery module, and the inherent structure of the battery pack is utilized to replace a part for supporting and fixing the cooling device, so that the heat dissipation efficiency of the battery can be improved, the internal structure of the battery can be simplified, and the cost of the battery can be reduced; 5) the protective plate structure of the existing battery module can be replaced by the liquid cooling plate, so that the liquid cooling plate has cooling and protective effects, and cooling parts can be added on the basis of not increasing the structure of the existing battery module, so that the cooling effect can be improved, and the internal structure of the battery can be simplified; 6) two adjacent battery direct-connection groups arranged in parallel can be enabled to share one heat conduction plate, even two adjacent battery direct-connection groups arranged side by side in a plurality of battery direct-connection group layers can share one heat conduction plate, so that the number of the heat conduction plates in the cooling device can be greatly reduced, and the internal structure of the battery is simpler; 7) the projection of the heat conducting plate on the liquid cooling plate is a curve, so that the contact area of the heat conducting plate, the heat conducting glue and the liquid cooling plate can be further increased, and the cooling efficiency is further increased. Compared with the prior art, a plurality of electric core stacks body can share a liquid cooling board in this battery package, and the heat conduction glue with the contact of laminate polymer battery core and with electric core heat direct transfer for liquid cooling board derivation, not only heat conduction efficiency is high and battery inner structure is simple, the equipment degree of difficulty is little, the demand that the adaptation battery system height that can also be better reduces.

According to a second aspect of the present invention, the utility model provides a vehicle. According to the utility model discloses an embodiment, this vehicle includes foretell battery package. The power battery in the vehicle has the advantages of good heat dissipation effect, light weight, longer cruising ability and more stability. It should be noted that the type of the vehicle is not particularly limited, and those skilled in the art can select the vehicle according to actual needs, for example, the vehicle may be a new energy vehicle or the like. In addition, it should be noted that the features and effects described for the battery pack are also applicable to the vehicle, and are not described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A battery pack, comprising:

the battery module comprises at least one layer of battery direct connection group layer, each layer of battery direct connection group layer at least comprises two battery direct connection groups, each battery direct connection group comprises one or more battery cell stacking bodies, each battery cell stacking body respectively and independently comprises a plurality of soft package battery cells stacked horizontally, each soft package battery cell comprises a plurality of serially connected pole core groups, and each pole core group comprises at least one pole core; the plurality of battery direct-connection groups in each battery direct-connection group layer are arranged side by side at intervals, two ends of each battery direct-connection group distributed along the length direction of the battery direct-connection group are respectively and independently provided with a first tab support, two first tab supports at the same end of two adjacent battery direct-connection groups arranged side by side are connected, and an accommodating space is defined between the two battery direct-connection groups and the first tab supports at the two ends;

cooling device, cooling device includes liquid cold plate, heat-conducting plate and heat conduction glue, the liquid cold plate with the battery directly links the group layer thermal contact just battery module upper surface and/or lower surface have arranged the liquid cold plate, the liquid cold plate with accommodation space encloses and closes the formation holding tank, the heat-conducting plate with the liquid cold plate stationary phase links to each other and inserts in the holding tank and this holding tank is by another liquid cold plate or guard plate involution, arbitrary two adjacent and arrange side by side the battery directly links to each other and has arranged between the group the heat-conducting plate, the heat conduction glue sets up the battery directly link the group with between the heat-conducting plate, the heat-conducting plate is in projection on the liquid cold plate is wave line or Z shape zigzag line.

2. The battery pack according to claim 1, wherein a structural adhesive is independently disposed at a joint of any two of the pole core groups connected in series in the flexible package battery cell, the structural adhesive is bonded to the flexible package battery cell casing and divides the flexible package battery cell into a plurality of relatively independent accommodating spaces, and each accommodating space accommodates one of the pole core groups.

3. The battery pack according to claim 1, wherein the flexible packaging battery cell comprises 2-4 series-connected battery cell stacks, the length of each battery cell stack is not less than 600mm, and each battery cell stack comprises 1-3 series-connected battery cell stacks.

4. The battery pack according to any one of claims 1 to 3, wherein the direct battery connection group includes one battery cell stack or a plurality of battery cell stacks connected in series, each of the series connections is independently provided with a second tab support, a first through hole is provided on the first tab support, a second through hole is provided on the second tab support, each column of the direct battery connection group layer in the battery module is provided with a first through channel formed by a plurality of the first through holes and a second through channel formed by a plurality of the second through holes along a height direction thereof, and a plurality of layers of the direct battery connection group layers are fixedly connected through the first through channel and/or the second through channel.

5. The battery pack according to claim 4, wherein two adjacent straight battery connection groups arranged side by side in each layer of the straight battery connection group are welded and connected through the first tab bracket; alternatively, the first and second electrodes may be,

be equipped with the third through-hole on the first utmost point ear support, every layer the battery directly links the group layer and follows the battery directly links the direction that the group arranged side by side and is equipped with by a plurality of the third through-channel that the third through-hole formed, every layer the battery directly links the group layer and passes through the third through-channel is fixed continuous.

6. The battery pack according to claim 5, wherein the liquid cooling plate is provided with a fourth through hole and/or a first protrusion corresponding to the first through channel and/or the second through channel, the protection plate is provided with a fifth through hole and/or a second protrusion corresponding to the first through channel and/or the second through channel, the liquid cooling plate is fixedly connected with the battery direct connection assembly layer through the fourth through hole and/or the first protrusion, and the protection plate is fixedly connected with the battery direct connection assembly layer through the fifth through hole and/or the second protrusion.

7. The battery pack according to claim 1 or 6, comprising two liquid cooling plates, wherein the two liquid cooling plates are respectively disposed on the upper surface and the lower surface of the battery module; alternatively, the first and second electrodes may be,

the protection plate is arranged on the lower/upper surface of the battery module, and the liquid cooling plate is arranged on the upper/lower surface of the battery module; alternatively, the first and second electrodes may be,

including two guard plates and one the liquid cooling board, two the guard plate is arranged respectively battery module lower surface and upper surface, the liquid cooling board is arranged adjacent two-layerly the battery directly links between the group layer.

8. The battery pack according to claim 7, wherein the protection plate and the liquid cooling plate are respectively and independently provided with a clamping groove formed by two limiting strips, and the clamping groove is suitable for limiting the heat conducting plate on the other liquid cooling plate.

9. The battery pack of claim 1 or 8, wherein the heat conductive plate is integrally formed with the liquid cooling plate.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.

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