Search

CN-115117504-B - Power storage battery and vehicle equipped with the same

CN115117504BCN 115117504 BCN115117504 BCN 115117504BCN-115117504-B

Abstract

The battery (3) comprises at least one assembly (5) of electric storage cells (7), the electric storage cells (7) having opposite large faces (9) separated from each other by gaps (19), a plurality of partitions (25) in each gap (19) defining between them a plurality of channels (27) for circulation of a heat transfer fluid, a circuit (31) for cooling the electric storage cells (7) comprising a plurality of distribution channels (35) formed between the bottom (21) of the battery and the lower face (11) of the electric storage cells (7), the distribution channels (35) distributing the heat transfer fluid in the circulation channels (27) of all the gaps (19).

Inventors

  • Frederick Grebel
  • Christopher Bulley

Assignees

  • 佛吉亚排气系统有限公司

Dates

Publication Date
20260505
Application Date
20220318
Priority Date
20210319

Claims (7)

  1. 1. An electric storage battery, the electric storage battery (3) comprising: -at least one assembly (5) of electric storage cells (7), each electric storage cell (7) having two large faces (9) perpendicular to a main direction (P), a bottom face (11) connecting the two large faces (9) to each other, and an upper face (13) connecting the two large faces (9) to each other and opposite the bottom face (11), the electric storage cells (7) being aligned along the main direction (P) and forming a rectilinear row in which adjacent two electric storage cells (7) have facing large faces (9) separated from each other by a gap (19); -a plurality of partitions (25) in each gap (19), said plurality of partitions (25) defining between them a plurality of circulation channels (27) for circulation of a heat transfer fluid in contact with said large face (9) defining said gap (19), said circulation channels (27) being parallel to each other and extending along a height direction (E) over the entire height of said gap (19), said circulation channels (27) being open at both said bottom face (11) and said upper face (13) of the two electric storage cells framing said gap (19); -a bottom portion (21) extending below the electric storage cells (7), the bottom portion (21) being opposite to a bottom face portion (11) of the electric storage cells (7); -a cooling circuit (31) for cooling the electric storage cells (7), the cooling circuit (31) comprising an upstream collector (33) and a plurality of distribution channels (35) in fluid connection with the upstream collector (33), the distribution channels (35) extending in the main direction (P) and being arranged between the bottom (21) and the bottom face (11) of the electric storage cells (7), the distribution channels (35) distributing the heat transfer fluid into the circulation channels (27) of all gaps (19), The cooling circuit (31) further comprises a downstream collector (37) and a sub-collector (39) for each module (5) for collecting heat transfer fluid, the sub-collector (39) being in fluid connection with the downstream collector (37), the circulation channels (27) of all the gaps of a given module (5) leading to the sub-collector (39) associated with that module, the sub-collector (39) extending in the main direction above the upper face (13) of the storage cells of the module; Wherein the divider (25) in each gap (19) is a plastic strip abutting two large faces (9) defining the gap (19); each gap (19) has a first number N1 of circulation channels (27), the number N1 of distribution channels (35) of the cooling circuit (31) being equal to the number of circulation channels (27) for each module (5), each distribution channel (35) feeding the circulation channels (27) of each gap (19) of the module (5).
  2. 2. The electric storage battery according to claim 1, wherein the electric storage battery (3) comprises a spacer structure (45) placed on the bottom (21), the spacer structure (45) comprising a plurality of profiles (47, 49) extending along the main direction (P), the profiles (47, 49) defining the distribution channel (35) therebetween.
  3. 3. The electric storage battery according to claim 1 or 2, wherein the electric storage battery (3) comprises two lateral stiffeners (51) for each component (5) of an electric storage cell (7), the two lateral stiffeners (51) extending along the main direction (P) and defining a compartment (53) therebetween, the components (5) of an electric storage cell (7) being arranged in the compartment (53), wherein a space (55) is present between the components (5) of an electric storage cell (7) and each lateral stiffener (51), an adhesive resin (56) filling the space (55) and adhesively attaching the electric storage cell (7) to the lateral stiffener (51).
  4. 4. A power storage battery according to claim 3, wherein a wire (59) is arranged in each space (55), the wire (59) extending along the entire length of the space (55) in the main direction (P) and near the bottom (21).
  5. 5. The electrical storage battery according to claim 4, wherein the or each wire (59) is made of an electrically conductive, resistive metal, and comprises a connector (64) arranged to selectively electrically connect the wire (59) to a power source.
  6. 6. A power storage battery according to claim 3, wherein a sheet (71) made of a material having a density of less than 40kg/m 3 is embedded in the adhesive resin (56) in the or each space (55).
  7. 7. A vehicle comprising the power storage battery (3) according to any one of claims 1 to 6.

Description

Power storage battery and vehicle equipped with the same Technical Field The present invention relates generally to power storage cells. Background The storage cells (ELECTRICITY STORAGE CELL) of such a battery may be cooled by immersion in a dielectric fluid. In this case, one possibility is to arrange the circulation of the dielectric fluid so that it flows in contact with the three small faces of the electric storage cells. This cooling method is more effective than the conventional electric storage battery cooling system. In these conventional systems, the heat transfer fluid circulates outside the cell in contact with the bottom on which the electricity storage cells rest. Furthermore, cooling of the storage battery is critical for battery life in certain situations, especially during fast recharging. Disclosure of Invention Under such circumstances, an object of the present invention is to provide an electric storage battery capable of more effectively cooling an electric storage cell. To this end, according to a first aspect, the invention relates to an electric storage battery comprising: -at least one assembly (set) of cells, each cell having two large faces perpendicular to the main direction and a bottom face connecting the two large faces to each other, the cells being aligned in the main direction and forming a rectilinear row in which adjacent two cells have opposite large faces separated from each other by a gap; -a plurality of partitions in each gap, the partitions defining between them a plurality of channels for circulation of a heat transfer fluid in contact with the large faces defining the gaps; -a bottom portion extending below the power storage cells, the bottom portion being opposite to the lower face portion of the power storage cells; -a cooling circuit of the electric storage cells, the circuit comprising an upstream collector and a plurality of distribution channels in fluid connection with the upstream collector, the distribution channels extending in a main direction, being arranged between the bottom and the lower face of the electric storage cells, the distribution channels distributing the heat transfer fluid into the circulation channels of all the interspaces. Thus, the circulation of the heat transfer fluid is organized such that the fluid circulates in contact with the large face of the electricity storage cell. This contributes to particularly efficient cooling. In practice, these monomers comprise an outer housing defining a large face into which several windings are inserted. The windings include at least one cathode and anode assembly separated by a separator. The windings are in contact with almost the entire surface of the large face. During charging and discharging of the power storage cells, mainly the windings heat up due to conductivity and heat up the large surface of the battery. The above-described separator makes it possible to arrange a plurality of circulation passages in each gap, and thus appropriately guide the heat transfer fluid in contact with the large face portion, thereby achieving good cooling of the power storage cells. The distribution channels extending below the cells are capable of cooling the underside of the power storage cells and distributing the heat transfer fluid into the circulation channels of all the gaps. The storage battery may also have one or more of the following features considered alone or in any technically feasible combination: In each gap, the divider is a strip of plastic material resting on the two large faces delimiting the gap; The battery comprises a separator parallel to the two large faces delimiting said gap in each gap, the separators each comprising at least one strip of plastic material placed on one side of the separator, preferably two strips of plastic material placed on both sides of the separator, the two strips of plastic material resting on the two large faces; in each gap, the separator is a relief provided in at least one large face defining the gap; The cell comprises a spacer structure placed on the bottom, the spacer structure comprising a plurality of profiles extending along a main direction, these profiles defining a distribution channel between them; The battery comprises two lateral stiffeners for each component of the battery cell, which extend in a main direction and delimit between them a compartment in which said component of the battery cell is located, wherein between the component of the battery cell and each lateral stiffener there is a space, which is filled with an adhesive resin and to which the battery cell is adhesively bonded; -in each space a wire is provided, which extends along the entire length of the space in the main direction and near the bottom; the or each wire is made of an electrically conductive, electrically resistive metal and comprises a connector arranged to selectively electrically connect the wire to a power source; -integrating a sheet of very low density mate